BetaFPV BNF Beta85X 4K 4S Micro Whoop Quadcopter - Choose Your RX

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Beta85X 4K 4S Whoop is no doubt the smallest 4S 4K drone!

Since YKS has shared his cinewhoop 4K with a stunning videography, people are fascinated in 4K whoop. So here we are. A real 4S 4K Beta85X whoop!!! Upgraded F4 V2 FC with BLHeli_32 16A ESC, using single N-channel MosFETs, makes the structure and performance more stable and support 4S power definetly. Mounting with Tarsier 4K camera, great choice for cruising, so you can get tons of fun in this cine whoop.

Check out all our pre-built quads, and our BetaFPV selection!


  • F4 V2 FC board has added extra 4 pluggable ports for ESC, VTX, RX and LED board, convenient installation and decreasing the dislocated PIN mounting.
  • High performance STM32F405 processor FC boards and tuned Betaflight OMNIBUSF4SD (OBSD). Faster input signals with lower latency and higher update rate are reachable. 
  • Using single N-channel MosFETs on ESC board which have a lower inner resistance. It is dual MosFETs on the original BLHeli_32 ESC board. 
  • Soldering with 25V/220uf electrolytic capacitor, for protecting ESC board, reducing the defective rate caused by the instantaneous high voltage.
  • Installed with Caddx Tarsier 4K camera with ND8 fliter which supports APP setting and switchable resolution setting of 4K, 2.7k, 1440P, 1080P.
  • Upgraded 1105 motor from 6000KV to 5000KV,  with a light weight but definitely will give you extreme power and speed. Motor comes with cable connectors.
  • Durable and light enough frame is customized for the Beta85X. To increase its stability, we specially add an extra stiffener brace of carbon fiber. Whole drone no soldering or tinkering necessary.
  • 450mAh 4S high rate battery is recommended by default. But pilot could also use their own batteries with battery strap. Optional and affordable.

For 85mm brushless whoop drones, there are 3 versions for your choice - Beta85X FPVBeta85X HD and Beta85X 4K.

BetaFPV BNF Beta85X 4K 4S Micro Whoop Quadcopter for Sale

     Beta85X 4K Specifications

    • Weight: 88.6g (without battery)
    • F405 V2 Flight Controller and 16A BLHeli_32 ESC
    • Motors: 1105 5000KV with connector
    • Props: 2" 4-Blades Props
    • Camera: CADDX Tarsier 4K
    • Canopy: Canopy for Tarsier 4K camera
    • Receiver option: Frsky XM+ / DSMX / Flysky / TBS Crossfire 
    • Recommend battery: RDQ 4S 525 LiHV or BetaFPV 4S 450 Battery (Not including)
    • 5.8G FPV antenna
    • Flight time: 4min - 6min with 450mAh 4S battery

    FC Specifications

    • CPU: STM32F405 (Overclock to 240MHz)
    • Six-Axis: MPU6000
    • Size: 26mm x 26mm, whoop mounting pattern
    • Firmware version: Betaflight OMNIBUSF4SD (OBSD)
    • OSD: Built-in BetaFlight OSD (STM32 controls OSD chip over SPI in DMA mode)

    BetaFPV BNF Beta85X 4K 4S for Sale

      ESC Specifications

      • Support BLHELI_32
      • Support PWM, Oneshot125, Oneshot42, Multishot, Dshot150, Dshot300, Dshot600, Dshot1200
      • Input voltage: 3-4S lipo
      • Cotinue current: 16A
      • Peak current: 19A 
      • Firmware target: BETAFPV-16A-32bit
      • MCU: STM32F051K66

      Camera Specifications

      • Weight: 19.5g
      • FOV: 4KF 2.8, FOV 150°(16/9), FPV FOV 165°(4/3)
      • Lens: Dual lens 2.8 / 12Mega
      • Image Sensor: 12M SONY sensor
      • TV System: NTSC / PAL, can be changed
      • Anti-Shake: Hardware anti-shake
      • Scene Mode: Auto / Personage / Scenery / Defog
      • Recording Timing Larm: OFF / 1mins / 3mins / 5mins / 10mins
      • Horizontal Resolution: 1200TVL
      • Image: 16:9 / 4: 3 (changeable)
      • Camera OSD: Seperate OSD
      • The camera tilt angle is switchable from 20 degree to 30 degree with ND8 fliter.

      BetaFPV BNF Beta85X 4K 4S Micro Whoop Drone for Sale

      What has BetaFPV done to support 4S?

      This Beta85X has upgraded in individual parts like FC, ESC, Motor, which can support 4S power with a steady performance and bring you into a glorious FPV world.

      F4 FC & BLHeli_32 ESC

      • Support 4S Power. Written for ESC's that utilize 32-bit MCU. With the increase in processing power, faster input signals with lower latency and higher update rate would be possible in BLHeli_32, such as Dshot1200!
      • Using single N-channel MosFETs on ESC board, witch have a lower inner resistance. It is dual MosFETs on the original BLHeli_32 ESC board. 
      • Current sensor included.
      • ESC is mounted on the frame by screws and connected with FC boards by cables.

      BetaFPV BNF Beta85X for Sale

      Power Capacitor

      Soldering with 25V/220uf electrolytic capacitor, for reducing the defective rate caused by the instantaneous high voltage.

      BetaFPV Beta85X for Sale

      1105 5000KV Motor

      Lower 5000KV for new Beta85X 4S, which could support 4S power which won't cause the issue of  overheat or burn (maybe the ESC).  Also change motor cables from 30AWG to 28AWG.

      BetaFPV BNF Beta85X Micro Whoop Quadcopter for Sale

      Frame Stiffener Brace

      The stiffener brace of carbon fiber can reinforce the Beta85X frame, avoid unstability caused by too strong power when Beta85x is flying.

      Caddx Tarsier 4K Camera

      Tarsier camera is the first DVR boards that could support 4K@30fps recording. Here is the basic manual for you to recording when get this Beta85X 4K drone.

      BetaFPV BNF Beta85X Micro Whoop Drone for Sale

      There are 2 buttons on the DVR board. One is for wifi and recording. The other one for power and recording video mode.

      Short Press Long Press (5-8s)
      Wifi/Record Button Start/Stop Recording Start Wifi
      Power/Mode Button  Switch Video Resolution Turn on/off Camera

       There are 2 LEDs to indicate the recording status.

      Flashing Flash Solid
      Wifi LED Wifi is power on and not connected Connected
      Mode LED Recording Not Recording

       For more details about the CADDX Tarsier camera, please download the Tarsier Manual here.

      Also, there is a CADDX Tarsier APP on Apple Store (for IOS phone) or Google Store (for Android phones). Through the APP, you could change the settings like Metering, White balance, EV compensation, IOS limit, Sharpness, Contrast, Saturation.

      BetaFPV BNF Beta85X 4K 4S Micro Whoop Quad for SaleND8 Fliter to get a better footage and eliminate the Jello effect. ND Filter-Light reduce but no color cast.

      Beta85X for Sale

      Props Out

      The Beta85X drone also comes with "props out" by default. Why we need "props out" direction?

      Default Betaflight props direction, quadcopter dips and "washes out" in hard corners. With reversed props or "props out", no more dipping even in hardest cornering.

      BetaFPV Beta85X Micro Drone for Sale

      Know more about "Props Out".

      Related Details

      • Join the online discussion about our X Series Whoop drones at Beta65X   Beta75X   Beta85X


      1. Update Cli Dump of Beta85X 4S. ( Click here to find the details) 

      2. How to set up SmartAudio vtx control?

      The set up is default when producing.  Multirotor Guide gives you the most straightforward explanation.


      • 1x Beta85X 4K Whoop Quadcopter(4S)
      • 1x ND8 Fliter for Tarsier 4K camera
      • 1x OSD Menu Board

      There are no batteries included. We recommend the RDQ Series 4S 525mAh LiHV Battery!

      Beta85X Drone for Sale