Bad Elf Flex Extreme GPS Receiver

Bad Elf Flex Extreme GPS Receiver


Brand: Bad Elf

SKU: BE-GPS-6500


Authorized Dealer

Bad Elf Flex Extreme GPS Receiver
  • If you require an RTK survey-grade rover for use more than 30 to 40 days a year, consider the Extreme bundle. 
  • Purchase at time of sale 
  • The Bad Elf Flex Extreme bundle includes the following unlocked services: 
    • Daily cost - none 
    • Fully unlocked RTK engine 
    • Multiple-constellation enabled 
    • Multiple-frequency enabled 
BAD ELF FLEX Extreme Details:
  • BAD ELF FLEX Extreme PN# BE-GPS-6500 (formally BE-GPS-5500 & BE-OTU-5000)
  • The Bad Elf Flex is a high performance GNSS receiver with fully unlocked RTK engine capabilities and access to the Atlas L-Band correction service. 
  • This multi-constellation and multi-frequency bluetooth enabled GNSS receiver is the economic, comparative advantage in a total geospatial solution. 
  • Bad Elf Flex Extreme delivers accuracy all day, every day, with 1 cm horizontal accuracy RTK (permanent) via NTRIP.
  • For use with the Bad Elf Flex app or with phones or tablets using location-aware apps. 
  • The Bad Elf Flex App is specifically designed for Bad Elf Flex & Bad Elf Flex Extreme, with a built-in NTRIP client. 
  • It is also cross-platform compatible for complete receiver control. 
  • Bad Elf Flex is compatible; the unit is app agnostic and works with iOS, Android, and Windows. 
  • On-demand data logging is fully compatible with Android, iOS and Windows location-aware apps. 
  • The Bad Elf Flex meets all requirements under Apple's MFi program, and works great with any location-based app in the App Store providing standalone Raw-data logging in RINEX format for post-processing NMEA logging in standard NMEA 0183 format.
  • The Bad Elf Flex Extreme is the perfect solution for GIS, mapping, agriculture, and survey data collection.
  • 1 cm RTK via NTRIP
  • 5 cm to 10 cm via satellite corrections worldwide
  • 30 cm - 60 cm via SBAS
  • 1 m autonomous
  • 10.0 x 2.75 / 254mm x 70mm IP65 Rated Receiver that only weighs 29oz / 854g
  • 11 hour Battery Life
  • App agnostic - works with iOS, Android, and Windows
  • Integrated keyboard and sunlight readable LCD
Post-processing capable:
  • Multi-frequency / multi-constellation - BeiDou, Galileo, GPS, and Glonass
What's in the Box:
  • BE-GPS-6500 Flex receiver w/ Extreme Accuracy, Permanent Activation 
    • With multi-constellation, multi-frequency and real- time kinematic support permanent activation*
    • *Extreme activation is a one-time purchase, Bad Elf Flex is updated over the air
  • 3ft (90cm) Mini-USB cable for charging
  • 12-24V DC vehicle USB charger
  • Wall adapter
  • Accessory case
  • Rugged waterproof case
  • 5/8" x 11 to 1/4" x 20 adapter
  • User's Manual

Warning: Tablet and Pole in Pic, sold separately

Bad Elf Flex Manual

  • PART NUMBER: Model BE-GPS-6500 (formally BE-5500GPS)


  • GPS: L1CA / L1P / L1C / L2P / L2C / L5
  • GLONASS: G1/G2/P code (P1/P2)
  • BeiDou: B1/B2/B3 (separate variant without L5)
  • Galileo: E1BC / E5a / E5b
  • QZSS: L1CA / L1C / L2C / L5


  • Horizontal accuracy - RTK: 1 cm
  • Horizontal accuracy - SBAS (WAAS): 30-60 cm
  • Horizontal accuracy - Autonomous: 1.2 m
  • Horizontal accuracy - L-Band via Atlas: 4 cm
  • Timing (1PPS) accuracy: 20 ns
  • Cold start time: < 60 s typical (no almanac or RTC)
  • Warm start time: < 30 s typical (almanac and RTC)
  • Hot start time: < 10 s (almanac, RTC, and position)
  • Maximum speed: 1,850 kph (999 kts)
  • Maximum altitude: 18,288 m (60,000 ft)
  • Differential options: SBAS, Autonomous, External RTCM v2.3, RTK v3, L-band (Atlas), and DGPS
  • Correction I/O protocol: Hemisphere GNSS ROX, RTCM v2.3 (DGPS), RTCMv3 (RTK), CMR, CMR+, Atlas


  • USB: USB 2.0 device via Mini-USB receptacle, USB 2.0 host OTG via supplied adapter
  • Bluetooth: Bluetooth V4.0 (HS) with integrated Class 1.5 PA, Supports 3 simultaneous connections
  • Wi-Fi: 802.11b/g/n


  • Platforms: iOS, Android, Windows
  • Mobile App: The Bad Elf Flex App requires iOS 9.0+ or Android 9+
  • Connectivity: Bluetooth SPP, USB Serial


  • Operating: 4F to +131F (20C to +55C)
  • Battery Powered: -14F to -140F (-10C to +60C)
  • Externally Powered: -22F to +140F (-30C to +60C)
  • Charging Temp: 41F to +113F (+5C to +45C)
  • Storage Temp: 40F to +167F (40C to +75C)


  • Full RTK: 11 hours
  • L-band Atlas: 8 hours


  • User interface: Transflective, LCD, Membrane Buttons, 3 multicolor LEDs, Audible tones
  • Dimensions: 10.0 x 2.75 / 254mm x 70mm
  • Weight: 29oz / 854g
  • Helical Antenna Phase Center: 23cm above base of Flex unit without adapter installed, Add 1.5cm with adapter installed


  • Humidity: 100% condensing
  • Waterproof: IP65


  • USB Port: Mini-USB port for charging and ElfPort expansion
  • Accelerometer: 3-axis
  • Display: 400 x 240 pixel transflective LCD screen with backlight
  • Firmware: Field upgradeable via app or USB

1Constellations and frequencies are dependent on receiver configuration and subscriptions.

WARNING - This product contains chemicals known to the state of California to cause cancer, birth defects or other reproductive harm.  For more information go to