Overview
The Firefly 20PRO 4S / Firefly 25MINI 3S is an FPV micro drone platform built around the DJI O4 PRO video transmission system. It is designed to give two flight styles: the 2.5-inch 3S model for long-endurance freestyle and aerial shooting, and the 2-inch 4S model for high-power racing and extreme freestyle maneuvers. The design includes factory pre-tuned PID, a crash-resistant carbon fiber frame, a built-in buzzer, and solder-free (plug-and-play) connections for VTX + buzzer + RX + GPS.
Key Features
- DJI O4 PRO video transmission system
- Seamless VTX swap between two drones (no re-soldering or calibration stated)
- Factory pre-tuned PID
- High-strength carbon fiber frame with reinforced front arm
- Built-in buzzer with one-click trigger for locating the drone
- Solder-free VTX + Buzzer + RX + GPS (plug-and-play)
- Shock-absorbing gimbal with 0°–25° adjustable lens angle to reduce vibration/jello
Specifications
Firefly 25MINI 3S
| Video Transmission System | DJI O4 PRO |
| Weight | 113.5g |
| Flight Controller MCU | STM32F405 |
| AIO | GOKU F405 SE 3-4S 20A AIO |
| Gyroscope | ICM42688-P / MPU6000 |
| Black Box | 8MB |
| Motor | ROBO 1303 6000KV |
| Props | 2520-3 3 Blade 1.5mm shaft |
| Battery Connector | XT30 |
| Voltage input | 3S LiHV (Recommend 450mAh / 750mAh / 1000mAh) |
| Flight Times (Data based on DJI O4 PRO VTX setup) | 1000mAh: 12 min 30 sec; 750mAh: 9 min 30 sec; 550mAh: 8 min; 450mAh: 5 min |
| Throttle (Data based on DJI O4 PRO VTX setup) | 1000mAh: 27%; 750mAh: 26%; 550mAh: 25%; 450mAh: 22% |
| Max Speed | 95km/h |
Firefly 20PRO 4S
| Video Transmission System | DJI O4 PRO |
| Weight | 113g |
| Flight Controller MCU | STM32F405 |
| AIO | GOKU F405 SE 3-4S 20A AIO |
| Gyroscope | ICM42688-P / MPU6000 |
| Black Box | 8MB |
| Motor | ROBO 1303 6000KV |
| Props | 2023-3 3 Blade 1.5mm shaft |
| Battery Connector | XT30 |
| Voltage input | 4S LiHV (Recommend 550mAh / 750mAh) |
| Flight Times (Data based on DJI O4 PRO VTX setup) | 750mAh: 6 min 30 s |
| Throttle (Data based on DJI O4 PRO VTX setup) | 750mAh: 24% |
| Max Speed | 120km/h |
Applications
- Firefly 25MINI 3S: Long-endurance freestyle flying; Medium-to-long-distance racing; Travel photography/videography
- Firefly 20PRO 4S: High-burst-power racing; Extreme freestyle maneuvers; Flexible indoor/outdoor flying
What’s Included
- Firefly 20PRO(25MINI) O4 PRO
- Firefly 20PRO(25MINI) Drone Kit
- 1 x Firefly 20PRO(25MINI) O4 PRO Drone
- 8 x 2023-3 Propellers Purple
- 1 x Hex Wrench
- 2 x Battery Anti-Slip Pads
- 1 x ND Filter
- 1 x 90° USB Type-C Data Cable
- 2 x 10*130mm Battery Straps
- 2 x Plastic protective side panel (Purple)
- 2 x Plastic protective side panel (Black)
- 1 x Flywoo O3/O4 Shock Absorber Ball
- 1 x M2×6.6mm Shock Absorber Ball
- 5 x M2 Nylon Nuts
- 5 x Washers
- Complete Screw Kit: 5 x M2x10 NHex Socket Head Cap Screws; 2 x M2x8 NHex Socket Head Cap Screws; 10 x M2x7 NHex Socket Head Cap Screws; 2 x M2x6 NHex Socket Head Cap Screws; 4 x M2x5 NHex Socket Head Cap Screws; 5 x M2x4 NHex Socket Head Cap Screws; 10 x M2x3 NHex Socket Head Cap Screws
For wiring, setup, and compatibility questions (DJI O4 PRO, batteries, or spares), contact support@rcdrone.top or visit https://rcdrone.top/.
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