Product Details
Happymodel Mobula8 O4 2S Micro FPV Whoop – HD in Miniature
You asked for it. Actually, you begged for it in the YouTube comments section of every reviewer from Nick Burns to Bardwell. "Put the O4 in a whoop," you typed, ignoring the laws of physics. Well, Happymodel actually did it. The Mobula8 O4 is an 85mm scream-machine packing the pristine, high-bitrate goodness of the DJI O4 Air Unit into a frame that weighs less than a bag of crisps. It’s 2S power, it’s digital HD, and it’s ready to make your living room look like a movie set (before you crash into the TV).
The water droplets in the photo above were added by an overzealous art director who thinks physics is optional. In reality, this drone is violently allergic to H₂O. If you get it wet, it will release the magic smoke and die immediately. Keep it dry.
Why You Want It
Because the stock DJI O4 camera has an FOV so narrow it feels like looking through a toilet roll tube. Happymodel fixed that. They’ve slapped on a custom FOV Extender and included ND Filters right in the box, widening the view to a usable 150° so you can actually see the wall you’re about to hit.
This isn't just a camera carrier; it’s a tuned freestyle ripper. With EX1103 11000KV motors and an F405 flight controller running Betaflight 4.5.1, it handles like a dream. Plus, the onboard UART ExpressLRS means your control link won't failsafe just because you flew behind a sofa. It’s the ultimate "rainy day in the UK" remedy.
Specifications
- Video System: DJI O4 Air Unit (1080p @ 100fps, because pixels matter)
- Weight: 50g (This is not a typo, it's engineering witchcraft)
- Wheelbase: 85mm (Perfect for gaps, terrible for carpet fibres)
- Motors: EX1103 KV11000 (Spinning fast enough to generate their own weather system)
- FC: CrazyF405HD with built-in UART ELRS (No SPI limitation nonsense here)
- Battery: Supports 1-2S, but please use 2S 450-550mAh (Don't be that person flying 1S on this)
- Receiver: ExpressLRS 2.4GHz (Baked in, but reliable)
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 |
What’s in the Box*
- 1× Mobula8 O4 Frame (Pre-assembled, usually)
- 1× DJI O4 Air Unit (If you bought the version that includes it, obviously)
- 1× FOV Extender & Lens Holder (The real MVP)
- 1× Filter Set (UV, ND8, ND16)
- 1× Gemfan 2023 Propeller Set (You will break these)
- 1× Screw Driver & Spare bits
Important Product Notes
The "China" Situation: Read this carefully. Per DJI's strict policy, if the O4 unit acts up, warranty claims must go back to Mainland China. We (Unmanned Tech) cannot process O4 warranty claims locally in the UK. We know, it sucks. We don't make the rules; we just sell the cool toys.
Controller Setup: If you are one of the three people using the DJI FPV Remote Controller 3, you'll need to reflash Betaflight to add "SBUS" support. Everyone else on ELRS: bind and send it.
Disclaimer
The included FOV extender is 3D printed; it works perfectly, but don't expect injection-moulded smoothness—it's function over form, just like your soldering.
Still Here?
Why are you reading footer text? There is a 50g drone with O4 video waiting to be carted. Go buy some 2S LiPos while you're at it, because you know your old ones are puffed. Click the button, intimidate your house cat, and go fly.