Happymodel Mobula7 O4 2-Inch 2S Digital HD FPV Whoop with DJI O4 Air Unit and ELRS 2.4G Receiver

Overview

The Happymodel Mobula7 O4 is a compact and powerful 2-Inch 2S Digital HD FPV Whoop designed for indoor freestyle and backyard flying. Featuring the latest DJI O4 Air Unit, it delivers ultra-smooth 1080p video at up to 100fps, providing exceptional clarity and low-latency FPV experience. With its high-performance RS1102 KV10000 brushless motors and durable HQProp 45mm tri-blade propellers, this 2-inch drone offers efficient thrust, agility, and stability. The integrated ExpressLRS 2.4GHz receiver ensures reliable control, making the Mobula7 O4 ideal for beginners and experienced pilots alike.

Key Features

• 2-Inch Micro Whoop Frame (80mm wheelbase) for tight-space agility

• DJI O4 Air Unit supporting 1080p@100fps live feed and strong penetration

• RS1102 KV10000 motors with 45mm tri-blade props for efficient 2S power

• CrazyF405HD ELRS FC with built-in 12A ESC, blackbox, barometer, and sensors

• Built-in ExpressLRS 2.4GHz receiver with up to 500Hz refresh rate

• Lightweight and compact design ideal for indoor and micro freestyle flight

Specifications

Motor

• Model: RS1102 KV10000

• Configuration: 9N12P

• Stator Size: 11mm × 2mm

• Shaft Diameter: 1.5mm

• Dimensions: Φ13.5mm × 14mm

• Weight: 2.8g (each)

• Battery Support: 1–2S LiPo

Propellers

• Brand: HQProp

• Diameter: 45mm (≈2 inch)

• Pitch: 0.9

• Hub Thickness: 5mm

• Shaft Size: 1.5mm

• Weight: 0.33g (each)

• Material: Polycarbonate

Flight Controller

• Model: CrazyF405HD ELRS

• MCU: STM32F405RGT6 (168MHz, 1MB Flash)

• Gyro: BMI270 (SPI)

• Mount Size: 25.5mm × 25.5mm

• Power Input: 1–2S (2.9V–8.7V)

• ESC: 12A x 4 (BLHeli_S, Bluejay firmware)

• ESC Protocol: DSHOT300

• Blackbox: 8MB

• Barometer: BMP280

• Voltage Sensor Scale: 110

• Current Sensor Scale: 470

Receiver (ELRS 2.4GHz)

• Version: ExpressLRS V3.0.1

• Target: HappyModel EP2400 RX

• Antenna: 31mm copper wire

• Power Output: <12dBm

• Frequency: 2.4GHz

• Packet Rates: 25–500Hz

DJI O4 Air Unit

• Weight (w/ camera): ~8.2g

• Transmission Module: 30×30×6mm

• Camera Module: 13.44×12.36×16.5mm

• Frequency Bands: 5.170–5.250GHz / 5.725–5.850GHz

• Output Power:

  • 5.1GHz: <23dBm (CE)

  • 5.8GHz: <30dBm (FCC), <14dBm (CE)

• Live View: 1080p @ 30/50/60/100fps

Package Includes

Important Notice

Due to DJI’s official warranty policy, any issue with the O4 Air Unit must be serviced in mainland China. Please consider this before purchasing.