{"product_id":"emlid-reach-rs4","title":"Emlid Reach RS4","description":"\u003cp\u003eThe Emlid Reach RS4 is an all-band, all-constellation RTK GNSS receiver with built-in tilt compensation, a magnesium alloy body, and a dual-band UHF and LoRa radio system that transmits and receives on both frequencies. Designed for surveyors, drone-mapping operators, GIS crews, and construction teams who need centimeter-level positioning under tree canopy, in urban canyons, and at the edges of correction-network coverage, the RS4 tracks 672 channels across GPS, GLONASS, Galileo, BeiDou, QZSS, and NavIC — including the lower L5 and L6 bands that resist multipath and jamming. Pair it with a DJI, Autel, or Skydio RTK drone as a project-local base station, mount it on a survey pole for stake-out and topo, or set it up as a permanent CORS-style reference. Backed by Emlid Flow software and lifetime support from the manufacturer.\u003c\/p\u003e\n\n\u003cblockquote\u003e\u003cp\u003eAll-band RTK GNSS receiver. 672 channels, L1\/L2\/L5\/L6 across every major constellation, 7 mm + 1 ppm RTK accuracy, no-angle-limit tilt compensation, IP68 magnesium body, 16-hour battery, and dual-band UHF + LoRa radios that transmit and receive.\u003c\/p\u003e\u003c\/blockquote\u003e\n\n\u003ch2\u003eFeatures\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eAll-band, all-constellation tracking: GPS L1C\/A, L2C, L5; GLONASS L1OF, L2OF; Galileo E1-B\/C, E5a, E6; BeiDou B1I, B1C, B2a, B3I; QZSS L1C\/A, L1C\/B, L2C, L5; NavIC L1-SPS and L5-SPS\u003c\/li\u003e\n  \u003cli\u003e672 channels — tracks 40+ satellites simultaneously for steadier fixes under canopy and in urban environments\u003c\/li\u003e\n  \u003cli\u003eRTK positioning accuracy of 7 mm + 1 ppm horizontal, 14 mm + 1 ppm vertical, with typical convergence in under 5 seconds\u003c\/li\u003e\n  \u003cli\u003eNext-generation tilt compensation with no angle limit, factory calibration, and a few-second initialization (no walking pattern required) — immune to magnetic interference because it's IMU-only\u003c\/li\u003e\n  \u003cli\u003eDual-band radio that transmits and receives on both UHF (410–470 MHz, up to 2 W, TRIMTALK 450S protocol) and LoRa (868\/915 MHz, up to 1 W, license-free in most of North America)\u003c\/li\u003e\n  \u003cli\u003eBuilt-in global LTE modem with nano-SIM slot for NTRIP corrections from the Emlid NTRIP Caster or third-party caster networks\u003c\/li\u003e\n  \u003cli\u003eMagnesium alloy body — the same material class used in aerospace housings — for a lighter, stronger receiver than a polycarbonate-shell equivalent\u003c\/li\u003e\n  \u003cli\u003eIP68 ingress protection, rated for dust, immersion, and continuous rain\u003c\/li\u003e\n  \u003cli\u003eOperating temperature from -40 °C to +65 °C (-40 °F to +149 °F) for cold-weather survey work and hot-climate operations\u003c\/li\u003e\n  \u003cli\u003e16 hours of continuous battery life as an RTK rover with tilt enabled, from the internal 5000 mAh \/ 36 Wh Li-ion pack\u003c\/li\u003e\n  \u003cli\u003eUSB-C Power Delivery charging at 5\/9\/12\/15 V — recharge from a laptop, USB-C wall brick, or field power bank\u003c\/li\u003e\n  \u003cli\u003eEmlid Quick Release adapter mount (sold separately) eliminates pole backlash for accurate tilt measurements; standard 5\/8\"-UNC thread also accepts any survey pole or tripod\u003c\/li\u003e\n  \u003cli\u003e16 GB internal storage for RINEX, NMEA, LLH\/XYZ, and UBX log files\u003c\/li\u003e\n  \u003cli\u003eWi-Fi 802.11 a\/b\/g\/n and Bluetooth 5.1 for connection to Emlid Flow on iOS or Android\u003c\/li\u003e\n  \u003cli\u003eCompatible with the Emlid Flow and Flow 360 ecosystem for project management, stake-out, layouts, line surveys, cut-and-fill, and as-built verification\u003c\/li\u003e\n  \u003cli\u003eLifetime expert support from Emlid included with every receiver\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eWhat it does\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRTK rover:\u003c\/strong\u003e Receives corrections over NTRIP (cellular or Wi-Fi), UHF radio, or LoRa radio and delivers centimeter-level position to Emlid Flow or any compatible data collector\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRTK base station:\u003c\/strong\u003e Logs a known point, computes corrections, and broadcasts them to a rover, a drone, a tractor autopilot, or a GPR system via Emlid NTRIP Caster, UHF, or LoRa\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePPK base:\u003c\/strong\u003e Records raw RINEX observations alongside drone-collected geotags for post-processed kinematic workflows in Emlid Studio or third-party photogrammetry tools\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDrone RTK base:\u003c\/strong\u003e Streams RTCM3 corrections to DJI, Autel, and Skydio RTK aircraft over Emlid NTRIP Caster or Local NTRIP for sub-2 cm geotag accuracy in the field\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePermanent base \/ CORS-style reference:\u003c\/strong\u003e External power input through the bottom connector lets the receiver run indefinitely on a 6–36 V supply for fixed installations\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\n    \u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\n  \u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eManufacturer\u003c\/td\u003e\n\u003ctd\u003eEmlid Tech Kft. (Budapest, Hungary)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eProduct\u003c\/td\u003e\n\u003ctd\u003eReach RS4 multi-band RTK GNSS receiver\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eConstellations tracked\u003c\/td\u003e\n\u003ctd\u003eGPS, GLONASS, Galileo, BeiDou, QZSS, NavIC\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eFrequency bands\u003c\/td\u003e\n\u003ctd\u003eL1 \/ L2 \/ L5 \/ L6\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eChannels\u003c\/td\u003e\n\u003ctd\u003e672\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eRTK accuracy (horizontal)\u003c\/td\u003e\n\u003ctd\u003e7 mm + 1 ppm\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eRTK accuracy (vertical)\u003c\/td\u003e\n\u003ctd\u003e14 mm + 1 ppm\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003ePPK accuracy (horizontal)\u003c\/td\u003e\n\u003ctd\u003e5 mm + 0.5 ppm\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003ePPK accuracy (vertical)\u003c\/td\u003e\n\u003ctd\u003e10 mm + 1 ppm\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eStatic accuracy (horizontal)\u003c\/td\u003e\n\u003ctd\u003e4 mm + 0.5 ppm\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eStatic accuracy (vertical)\u003c\/td\u003e\n\u003ctd\u003e8 mm + 1 ppm\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eTilt compensation\u003c\/td\u003e\n\u003ctd\u003eRTK + 2 mm + 0.3 mm per degree of tilt, no angle limit\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eConvergence time\u003c\/td\u003e\n\u003ctd\u003e~5 seconds typical\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eUpdate rate\u003c\/td\u003e\n\u003ctd\u003eUp to 10 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eUHF radio\u003c\/td\u003e\n\u003ctd\u003e410–470 MHz, TRIMTALK 450S, up to 2 W, transmit and receive\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eLoRa radio\u003c\/td\u003e\n\u003ctd\u003e868 \/ 915 MHz, up to 1 W, transmit and receive (license-free in most of North America at 915 MHz)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eLTE modem\u003c\/td\u003e\n\u003ctd\u003eGlobal bands, nano-SIM slot\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eWi-Fi\u003c\/td\u003e\n\u003ctd\u003e802.11 a\/b\/g\/n\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eBluetooth\u003c\/td\u003e\n\u003ctd\u003e5.1 (BR\/EDR + LE)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003ePorts\u003c\/td\u003e\n\u003ctd\u003eUSB-C, RS-232 (via bottom connector)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eInternal storage\u003c\/td\u003e\n\u003ctd\u003e16 GB\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eData formats\u003c\/td\u003e\n\u003ctd\u003eRTCM3 corrections; NMEA, LLH\/XYZ position output; RINEX, NMEA, LLH\/XYZ, UBX logging\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eBattery\u003c\/td\u003e\n\u003ctd\u003e5000 mAh Li-ion, 7.2 V, 36 Wh, integrated (not user-replaceable)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eBattery life\u003c\/td\u003e\n\u003ctd\u003e16 hours as RTK rover with tilt\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eCharging\u003c\/td\u003e\n\u003ctd\u003eUSB-C Power Delivery (5\/9\/12\/15 V at 3 A)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eExternal power input\u003c\/td\u003e\n\u003ctd\u003e6–36 V via bottom connector\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eBody\u003c\/td\u003e\n\u003ctd\u003eMagnesium alloy\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eIngress protection\u003c\/td\u003e\n\u003ctd\u003eIP68\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eOperating temperature\u003c\/td\u003e\n\u003ctd\u003e-40 °C to +65 °C (-40 °F to +149 °F)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e128.6 × 128.6 × 99.3 mm (5.06 × 5.06 × 3.91 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e927 g (2.04 lb)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eMount\u003c\/td\u003e\n\u003ctd\u003e5\/8\"-UNC threaded insert\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eSoftware included\u003c\/td\u003e\n\u003ctd\u003eEmlid Flow (iOS, Android), Emlid Flow 360 (cloud), Emlid Studio (PPK post-processing)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eSupport\u003c\/td\u003e\n\u003ctd\u003eLifetime expert support from Emlid\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eWho this is for\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eLand surveyors needing a single all-band receiver that handles base, rover, tilt, and NTRIP duty without juggling separate radios or correction services\u003c\/li\u003e\n  \u003cli\u003eDrone mapping operators flying DJI Phantom 4 RTK, Mavic 3 Enterprise, Matrice 30\/30T, Matrice 300\/350 RTK, Matrice 4 Series, Autel EVO II RTK, or Skydio X10 platforms who want a project-local base for centimeter geotags instead of relying on public CORS\u003c\/li\u003e\n  \u003cli\u003eConstruction crews running stake-out, layouts, cut-and-fill, and as-built verification daily, where the tilt compensation removes the need to plumb the pole over every point\u003c\/li\u003e\n  \u003cli\u003eGIS and asset-mapping teams collecting points and lines under tree canopy or near buildings, where the all-band L5\/L6 tracking and improved antenna keep fixes stable\u003c\/li\u003e\n  \u003cli\u003eArchaeology, environmental, and research crews working in cold or hot climates where IP68 rating and the -40 to +65 °C range matter\u003c\/li\u003e\n  \u003cli\u003ePrecision agriculture operators integrating an RTK base with tractor autopilots, where the external power input keeps the receiver running on a 12 V or 24 V supply indefinitely\u003c\/li\u003e\n  \u003cli\u003ePublic-safety and emergency-mapping programs that need a portable, rugged base station for incident-area surveys without dependence on cellular coverage\u003c\/li\u003e\n  \u003cli\u003eExisting Reach RS2+ or RS3 owners upgrading for transmit-and-receive on both UHF and LoRa (the RS3 only received on UHF), faster tilt initialization, and the magnesium body\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eWhat's included\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e1 × Emlid Reach RS4 receiver\u003c\/li\u003e\n  \u003cli\u003e1 × Carrying case\u003c\/li\u003e\n  \u003cli\u003e1 × USB-C cable\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003ePlease note:\u003c\/strong\u003e Survey pole, tripod, Emlid Quick Release adapter, UHF antenna whip, LoRa antenna whip, nano-SIM card, NTRIP service subscription, and data collector (tablet or phone running Emlid Flow) are sold separately. The receiver ships with a built-in modem but no SIM card — supply your own or use Wi-Fi tethering for cellular NTRIP. For tilt-compensation work, the Emlid Quick Release adapter is strongly recommended to eliminate pole backlash.\u003c\/p\u003e\n\n\u003ch2\u003eReach RS4 vs. Reach RS3 vs. Reach RS2+\u003c\/h2\u003e\n\u003cp\u003eEmlid's current field-ready RTK lineup gives surveyors three tiers:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eReach RS2+:\u003c\/strong\u003e Multi-band RTK receiver with LoRa radio (transmit and receive) but no UHF, no tilt compensation, and a polycarbonate body. The value option for crews that mostly work over LoRa or NTRIP and don't need tilt.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eReach RS3:\u003c\/strong\u003e Multi-band RTK receiver with tilt compensation, LoRa transmit-and-receive, and UHF receive-only. Discontinued or de-emphasized as the RS4 takes over, but still in inventory at some dealers.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eReach RS4 (this product):\u003c\/strong\u003e All-band (adds L5\/L6 to the L1\/L2 stack), 672 channels, magnesium body, faster tilt initialization with no angle limit, and transmit-and-receive on both UHF and LoRa. The flagship single-IMU receiver in the lineup.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eReach RS4 Pro (sold separately):\u003c\/strong\u003e Adds a dual-camera AR system for visual stake-out and point capture; same GNSS engine, IMU, and radio system as the RS4. Pick the Pro if the workflow benefits from camera-aided positioning in confined, obstructed, or visually marked areas.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eDJI RTK drone integration\u003c\/h2\u003e\n\u003cp\u003eThe Reach RS4 acts as a base station for DJI Enterprise aircraft that support NTRIP corrections, including the Phantom 4 RTK, Mavic 3 Enterprise \/ Mavic 3 Multispectral \/ Mavic 3 Thermal, Matrice 30 \/ 30T, Matrice 300 RTK \/ 350 RTK, and Matrice 4 Series. The workflow:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eSet up the RS4 over a known point or run an averaged single-point base\u003c\/li\u003e\n  \u003cli\u003eStream RTCM3 corrections out over Emlid NTRIP Caster (internet) or Local NTRIP (Wi-Fi to the drone controller)\u003c\/li\u003e\n  \u003cli\u003eConnect the DJI remote controller to the same Emlid Caster mount point or local Wi-Fi NTRIP source\u003c\/li\u003e\n  \u003cli\u003eFly the mission — the drone applies corrections in real time for centimeter-accurate geotags\u003c\/li\u003e\n  \u003cli\u003eProcess the geotagged images in any photogrammetry pipeline (Pix4D, Metashape, DJI Terra, etc.) for survey-grade orthomosaics, point clouds, and DEMs\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe Reach RS4 also supports PPK workflows: log raw RINEX on the receiver during the flight, sync against the drone's onboard log file in Emlid Studio after landing, and produce corrected positions even if real-time RTK was unstable.\u003c\/p\u003e\n\n\u003ch2\u003eFAQ\u003c\/h2\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eWhat's the difference between the Reach RS4 and the Reach RS4 Pro?\u003c\/summary\u003e\n  \u003cp\u003eSame GNSS engine, same IMU, same radio system, same battery and body. The Pro adds a dual-camera AR module for visual stake-out and visual point capture — useful for survey work in confined spaces, marked locations, or anywhere a camera-aided workflow speeds things up. The standard RS4 is the right choice for crews who don't need the camera workflow and want to keep cost lower.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eDoes the RS4 work as a base station for DJI Phantom 4 RTK or Mavic 3 Enterprise?\u003c\/summary\u003e\n  \u003cp\u003eYes. The RS4 streams RTCM3 corrections over Emlid NTRIP Caster (cloud) or Local NTRIP (Wi-Fi) to any DJI Enterprise aircraft that accepts NTRIP input, including Phantom 4 RTK, Mavic 3E \/ 3M \/ 3T, Matrice 30 \/ 30T, Matrice 300 \/ 350 RTK, and the Matrice 4 Series. Emlid publishes step-by-step DJI integration guides in their documentation.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eHow is the tilt compensation different from the RS3?\u003c\/summary\u003e\n  \u003cp\u003eThe RS4 IMU initializes in a few seconds with natural pole movement — no walking pattern, no specific calibration dance. There's no angle limit, so the receiver stays accurate even when the pole is significantly tilted. The RS3 needed roughly 20 meters of walking or 10–20 seconds of tilting to initialize, and was rated up to 60° of tilt. The RS4's new IMU is the practical reason most users upgrade.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eDoes the LoRa radio require a license in the US?\u003c\/summary\u003e\n  \u003cp\u003eNo. The RS4's LoRa radio operates in the 915 MHz ISM band and supports up to 1 W of transmit power, which is within the FCC's license-free Part 15 limits for that band in the United States. The UHF radio (410–470 MHz) is a different matter — many UHF allocations require an FCC license depending on the frequency and use case. If you only use the LoRa link, no license paperwork is needed in the US.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eCan I use the RS4 without a cellular connection?\u003c\/summary\u003e\n  \u003cp\u003eYes. The receiver runs corrections over UHF radio, LoRa radio, or Wi-Fi (Local NTRIP), so a cellular SIM is optional. For crews that work in areas without LTE coverage — remote sites, forested canyons, foreign countries without roaming — set up the RS4 as a base over LoRa to a rover, or use Local NTRIP from the base to a drone controller over Wi-Fi.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eWhat software comes with the RS4?\u003c\/summary\u003e\n  \u003cp\u003eEmlid Flow (free mobile app for iOS and Android) handles project setup, point collection, stake-out, base configuration, and NTRIP connections. Emlid Flow 360 (free cloud service) syncs projects between field and office and lets multiple team members collaborate. Emlid Studio (free desktop app) handles PPK post-processing of RINEX logs. All three are included with the receiver — no subscription required.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eWhat's the warranty?\u003c\/summary\u003e\n  \u003cp\u003eEmlid covers the Reach RS4 against manufacturing defects under their standard warranty terms. The receiver also includes lifetime expert technical support — the support team responds within 24 hours and helps with everything from initial setup to specific drone integrations. Contact Emlid or your authorized dealer for warranty service.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eWhere does it ship from?\u003c\/summary\u003e\n  \u003cp\u003eEmlid ships from a Chicago warehouse to US customers via FedEx and UPS, with typical 2-7 day delivery. Emlid is a Hungarian company (headquartered in Budapest) with global distribution through authorized dealers.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eCan I check it on an airline?\u003c\/summary\u003e\n  \u003cp\u003eThe Reach RS4's battery is 36 Wh — well under the FAA \/ IATA 100 Wh threshold for lithium-ion batteries in carry-on. The receiver and battery travel as a single integrated unit (the battery isn't user-removable), so the whole receiver should travel as carry-on with you. Don't check it in luggage — embedded lithium batteries above the spare-battery thresholds should not go in checked baggage. Verify your specific airline's policy before traveling.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eDo I need a separate data collector?\u003c\/summary\u003e\n  \u003cp\u003eYes — you'll need a phone or tablet running Emlid Flow (iOS or Android). Most surveyors use a ruggedized tablet (Samsung Galaxy Tab Active series, iPad with a case, or a dedicated ruggedized Android tablet) for field work. Emlid Flow is a free download and doesn't require a paid subscription.\u003c\/p\u003e\n\u003c\/details\u003e","brand":"Emlid","offers":[{"title":"Default Title","offer_id":51742373675325,"sku":null,"price":3899.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0834\/1631\/8269\/files\/emlid-reach-rs4-against-white-background.webp?v=1779376664","url":"https:\/\/www.terrestrialimaging.com\/products\/emlid-reach-rs4","provider":"Terrestrial Imaging","version":"1.0","type":"link"}