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Description
Happymodel Mobula8 O4 2S Digital HD 85mm Micro FPV Whoop Drone - ELRS 2.4The Happymodel Mobula8 O4 micro FPV whoop comes out now . It comes with DJI O4 air unit which would provide excellent and unbelievable FPV footage. We added FOV Extender for the O4 camera on Mobula8, this would be a great improvement for FPV flying. Here is our recommended 2S 550mAh Battery that fits perfectly in this drone! Check out our Micro Whoop Drones, our entire Happymodel Products and The Digital BNF PNP RTF Collection. Features: Equipment
The Happymodel Mobula8 O4 micro FPV whoop comes out now . It comes with DJI O4 air unit which would provide excellent and unbelievable FPV footage. We added FOV Extender for the O4 camera on Mobula8, this would be a great improvement for FPV flying.
Here is our recommended 2S 550mAh Battery that fits perfectly in this drone!
Check out our Micro Whoop Drones, our entire Happymodel Products and The Digital BNF/PNP/RTF Collection.
Features:
- Equipment with DJI O4 air unit and external FOV Extender
- ND Filters ready
- 2S battery support Powerful and Smooth freestyle flying
- UART ExpressLRS receiver support stable control link
- Recommend use 2S 550Mah battery
Specifications:
- Item Name: Mobula8 O4 2S 85mm Digital HD Micro FPV whoop
- Wheelbase: 85mm
- Size: 120mm*120mm*53mm
- Weight: 50g
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:
Default factory Mobula8 O4 dump file for Betaflight 4.5.1
Package includes:
| Item Name | Qty |
| Happymodel Mobula8 Frame | 1 |
| CrazyF405HD ELRS flight controller firmware target:BETAFLIGHTF4 | 1 |
| EX1103 KV11000 brushless motor | 4 |
| Gemfan Hurricane 2023 tri-blade propellers(4cw+4ccw) | 1 |
| DJI O4 Air unit | 1 |
| FOV Extender for O4 camera | 1 |
| Angle-adjustable Canopy | 1 |
| Screw driver | 1 |
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.1 ★★★★★
Based on 9 reviews
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Product Reviews
★★★★★ 5
Great Little Scale
Model: K112BK
I think the size is perfect for my Turin Legato. Fits easily on the drip tray cover but able to get to touch keys easily. Like the touch features and glass top. It is thicker than advertised by a bit (0.78 in vs claimed 0.72).
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Reviewed in the United States on May 5, 2026
★★★★★ 5
great budget digital scale
Model: K112BK
Works well and battery has held up between charges. Measures my coffee beans every morning
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Reviewed in the United States on October 10, 2025
★★★★★ 5
Accurate
Model: K112BK
Love it. A wonderful addition to my coffee station
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Reviewed in the United States on June 3, 2026
★★★★★ 5
Slightly Inaccurate but Works Well
Pros:
Works perfectly for what I need it for. I use an aeropress and it's super easy to weigh the coffee going in and then the water on top of that. Then start the timer for the brew time and you've got a beautiful cup of coffee! Very bright display, easy to read, and comes with a rubber pad which makes cleanup easy.
Cons:
Not super accurate, but it's fine for making coffee unless you want to be exact. Sometimes the tare doesn't hold perfectly. For example, put your coffee on the scale. Tare it. Take it off. Put it back on. It might read a tenth of a gram or so one way or the other. Never impacted my coffee routine...
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Reviewed in the United States on March 13, 2021
★★★★★ 5
Been working well for over a year
Had this for over a year now and no real issues. The only issue I can think of is that if something is a bit too close to the scale, the scale can fluctuate a bit by a gram or so. Just make sure nothing is touching it, especially anything electronic.
Beyond that, it's a no-nonsense scale that works great with actual tactile buttons. Its refresh rate can lag behind a tiny bit, but you get used to it by stopping your pours in anticipation. For example, I typically do 300mL pours in total, and I usually start slowing down/stopping at around 280g. Battery life is pretty good, but the battery life indicator doesn't do a good job of letting you know when you need to replace the batteries. So you may end up with it powering off mid-brew, but I've only had to replace the batteries once despite daily use over the past year or so. That being said, it's useful to also do stuff like the 4:6 method based on water level vs timer too.
I'd also say it may not be extremely accurate as sometimes it fluctuates by .1 grams, but it is accurate enough for practical purposes. For reference, .1g is simply ~1 coffee bean, and unless you're an espresso perfectionist, 1 coffee bean isn't going to make any real difference.
In summary:
+ Just the essentials if you only want the essentials
+ Tactile buttons
+ Display is pretty nice
+ Accurate enough for practical purposes
+ Battery life very good
+ Will work for at least a year, can't say any longer until I own it for longer
+ Great for the cost
= WIll not refresh weight as quickly as say an acacia scale which costs at least four times as much, easy to compensate for
- Battery life indicator isn't great, so it may power off mid-brew every half year or so
- Sensitive to adjacent electronic devices, 1 or 2 inches is enough distance
- Sensitive to adjacent objects, be mindful of anything that is touching the silicone, even if it's barely touching by a hair
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Reviewed in the United States on September 7, 2025