HappyModel Mobula8 O4 ELRS 85mm 2S Digital FPV Whoop The HappyModel Mobula8 O4 2S 85mm brings true digital HD performance to the micro whoop class. Built around the DJI O4 Air Unit, this 2S powerhouse delivers crisp, low-latency HD video in a compact and agile 85mm platform — perfect for backyard freestyle, park ripping, and smooth cinematic micro flying. At its core is the CrazyF405HD flight controller with built-in ExpressLRS support, giving you reliable control link performance and modern Betaflight tuning capability. Combined with EX1103 11000KV brushless motors and responsive tri-blade props, the Mobula8 O4 offers punchy throttle, smooth control authority and stable flight characteristics on 2S power. Designed to balance power and efficiency, it performs best on 2S 450–550mAh packs, giving you strong acceleration and impressive flight feel for its size class. The DJI O4 system provides sharp digital clarity with excellent penetration and dynamic range, transforming the 85mm micro category into a proper HD flying experience. This is not just a tiny whoop — it’s a serious micro freestyle machine with digital vision. Product Highlights Wheelbase: 85mm Power: 2S LiPo Video System: DJI O4 Digital HD Flight Controller: CrazyF405HD (Betaflight compatible) Receiver: ExpressLRS Motors: EX1103 11000KV Propellers: 2-inch tri-blade Recommended Battery: 2S 450–550mAh Category: Digital HD Micro Whoop Product Information Brand Name: Happymodel Item Name: Mobula8 O4 2S 85mm Digital HD Micro FPV whoop Wheelbase: 85mm Size: 120mm*120mm*53mm Weight: 50g Option: DJI O4 air unit pre-assembled version Without DJI O4 air unit version(Need add your own DJI O4 air unit) In the box Item Name Qty Happymodel Mobula8 Frame 1 CrazyF405HD ELRS flight controller firmware target: CRAZYBEEF405 1 EX1103 KV11000 brushless motor 4 Gemfan Hurricane 2023 tri-blade propellers(4cw 4ccw) 1 DJI O4 Air unit or no DJI O4 Air unit version 1 FOV Extender for O4 camera 1 Angle-adjustable Canopy 1 Screw driver 1 Spare Parts Specifications Motor Mode: EX1103 KV11000 Configu-ration:9N12P Stator Diamter:11mm Stator Length:3mm Shaft Diameter:Φ1.5mm Motor Dimension(Dia.*Len):Φ13.5mm*15.5mm Weight(g):3.8g No.of Cells(Lipo):1-2S Propellers Weight:0.88g Material: PC Pitch:2.3inch Props Dia:52.17mm Center Thickness:5mm Center Hole Dia:1.5mm Flight controller MCU: STM32F405RGT6 (168MHZ, 1Mbyte FLASH) GYRO Sensor: BMI270 (SPI connection) Mount hole size: 25.5mm*25.5mm Power supply: 1-2S battery input (DC 2.9V-8.7V) Built-in 12A(each) Blheli_S 4in1 ESC Built-in Serial ExpressLRS 2.4GBuilt-in BMP280 BarometerBuilt-in 8MBp blackbox Built-in voltage meter sensor , voltage meter scale 110 Built-in current meter sensor , current meter scale 470 Onboard 4in1 ESC Power supply: 1-2S LiPo/LiPo HV Current: 12A continuous peak 15A (3 seconds) Support BLHeli_S Bluejay firmware Factory firmware: Bluejay ESC V0.19Firmware target: Z-H-30 Default protocol: DSHOT300 Onboard UART ExpressLRS 2.4GHz Receiver Packet Rate option: 25Hz/50Hz/150Hz/250Hz/500Hz RF Frequency: 2.4GHz Antenna: enameled copper wire 31mm length Telemetry output Power: <12dBm Default firmware version: ExpressLRS V3.0.1 Firmware target: HappyModel EP 2400 RX Could update firmware via ExpressLRS configurator DJI O4 Air Unit Weight: Air Unit (camera module included): Approx. 8.2 g Transmission Module: 30×30×6 mm (L×W×H) Camera Module: 13.44×12.36×16.50 mm (L×W×H) Camera Cable Length: 50mm Coaxial Cable: 50 mm 3-in-1 Cable: 50 mm Operating Frequency: 5.170-5.250 GHz 5.725-5.850 GHz Operating frequency varies by region. Refer to local regulations. Transmitter Power (EIRP): 5.1 GHz: <23 dBm (CE) 5.8 GHz: <30 dBm (FCC) <14 dBm (CE) <30 dBm (SRRC) Live View Quality: 1080p at 30/50/60/100fps FOV Extender for O4 Camera Weight: only 3.2gram Built-in widening lens FOV angle up to 150 degree 3d printed Camera holder Include UV filter, ND8 filter, ND16 filter ***If you want to use DJI FPV Remote controller, Please first reflash betaflight firmware add add “SBUS” protocol support when load firmware online. And then please import defaulct factor dump file to CLI command , then change betaflight settings like following picture,no need do any hardware modification to the flight controller: NOTES: If you want to use Barometer and want to upgrade firmware,you need to add custom Defines “BARO_DPS310” from build configuration of betaflight configurator before load online firmware. More Information Default factory Mobula8 O4 dump file for Betaflight 4.5.1 Final factory dump file of Mobula8 O4 for Betaflight 4.5.1
