Description
Overview
The iFlight Defender series proudly presents its latest upgrade—the Defender25 O4 4S HD, featuring the cutting-edge DJI O4 Air Unit Pro. With enhanced transmission, crystal-clear imaging, and ultra-low latency, the Defender25 sets a new standard in aerial filming performance and reliability. Get ready to push boundaries and redefine your FPV experience with the all-new Defender25.
Key Features
Ultralight & Travel-Ready
Weighing under 249g, the iFlight Defender25 meets exemption requirements in most countries, avoiding registration hassles. Its compact and lightweight design makes it your perfect travel companion for spontaneous FPV adventures.
Small but Mighty
Equipped with built-in 2.5-inch propeller guards and a durable injection-molded frame, the Defender25 offers outstanding motor and propeller protection. Fly boldly indoors or outdoors, enjoying unprecedented creative freedom without worrying about minor bumps.
O4 Video Transmission – Enhanced Perception
Integrated with the DJI O4 Air Unit Pro, the Defender25 features a 1/1.3-inch image sensor for capturing exquisite detail, even in low-light conditions. Its 155° ultra-wide-angle lens provides breathtaking visuals, while real-time 1080p/100fps transmission delivers an immersive flying experience.
Crash-Protected Quick-Release Battery
The innovative quick-release battery system allows fast, hassle-free swaps. The Defender25 comes standard with a 4S 550mAh battery, with an optional Endurance 900mAh battery for longer flights.
Optimized Antennas and Easy Maintenance
Built-in high-performance video and receiver antennas ensure strong signal quality. Practical design features include:
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Secured XT30 battery plug with anti-spark filter
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Motors marked with direction arrows
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Props with positioning columns for easy installation
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Accessible ports and buttons
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Mini camera mount (compatible with Naked GoPro, Insta360, etc.)
Optimized Landing Gear
The improved landing gear allows reliable takeoffs and landings even in complex environments.
Specifications
| Item | Details |
|---|---|
| Product Name | Defender25 O4 4S HD |
| Flight Electronics | BLITZ D25 F7 AIO |
| Video Transmission | DJI O4 Air Unit Pro |
| Frame Size | 112±2mm |
| Motor | Defender25 1404 |
| Propellers | Defender25 2525 Props (2.5 inch) |
| Aircraft Weight | 170±5g |
| Max Takeoff Mass (550mAh Battery) | ≤249g |
| Max Takeoff Mass (900mAh Battery) | ≤280g |
| Dimensions (L×W×H) | 158×155×69mm |
| Max Speed | 100km/h (Manual Mode) |
| Max Takeoff Altitude | 3500m |
| Max Hover Time | ~6 mins (550mAh) / ~10 mins (900mAh) |
| Max Flight Distance | 2–3 km |
| Max Wind Resistance | Level 4 |
| Operating Temperature Range | -10°C to 40°C (14°F to 104°F) |
| Antennas | Dual Antennas |
| GNSS | GPS + SBAS + Galileo + QZSS + GLONASS |
DJI O4 Air Unit Pro Specifications
| Item | Details |
|---|---|
| Image Sensor | 1/1.3-inch |
| Lens FOV | 155° |
| ISO Range | 100–25600 |
| Video Resolution | 1080p/100fps (H.265) |
| Video Format | MP4 |
| Max Video Bitrate | 130Mbps |
| Color Mode | Normal / D-Log M |
| Stabilization | RockSteady 3.0+ (Standard FOV only) |
| Live View Quality | 1080p@100fps |
| Operating Frequencies | 5.170–5.250 GHz, 5.725–5.850 GHz |
| Transmitter Power (EIRP) | 5.1GHz＜23dBm (CE) / 5.8GHz＜33dBm (FCC) / ＜14dBm (CE) / ＜30dBm (SRRC) |
| Max Video Transmission Range | 15km (FCC), 8km (CE/SRRC) |
| Communication Bandwidth | Max 60 MHz |
| Built-in Storage | 4GB |
| Supported SD Cards | microSD (up to 512GB) |
| Operating Temperature | -10°C to 40°C |
| Weight | ~32g (Air Unit + Camera Module) |
| Dimensions (Transmission Module) | 33.5×33.5×13 mm |
Packing List
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1 × Defender25 O4 HD BNF
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1 × Defender25 550mAh Battery
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1 × Type-C Charging Adapter
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2 × Defender 2525 Propeller Pairs
Recommended Charger
Charger not included.
For best performance, use a Flight PD 100W Charger, PD 30W Charger, or any USB charger supporting USB PD and QC fast charging protocols.
Recomandation Accessories
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Defender 2525 Props
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Type-C Charging Adapter
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Charging Adapter Board
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Defender25 Backpack
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Cable for GoPro Bones
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Defender 550mAh Battery
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Defender 900mAh Battery
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