iFlight Defender25 O4 4S HD Sub-249g 2.5 Inch FPV Drone with DJI O4 Air Unit Pro, GPS Module

Description

Overview

The iFlight Defender series proudly presents its latest upgradetheDefender25 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:

• Secured XT30 battery plug with anti-spark filter

• Motors marked with direction arrows

• Props with positioning columns for easy installation

• Accessible ports and buttons

• 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	1122mm
Motor	Defender25 1404
Propellers	Defender25 2525 Props (2.5 inch)
Aircraft Weight	1705g
Max Takeoff Mass (550mAh Battery)	249g
Max Takeoff Mass (900mAh Battery)	280g
Dimensions (LWH)	15815569mm
Max Speed	100km/h (Manual Mode)
Max Takeoff Altitude	3500m
Max Hover Time	~6 mins (550mAh) / ~10 mins (900mAh)
Max Flight Distance	23 km
Max Wind Resistance	Level 4
Operating Temperature Range	-10C to 40C (14F to 104F)
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	10025600
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	5.1705.250 GHz, 5.7255.850 GHz
Transmitter Power (EIRP)	5.1GHz23dBm (CE) / 5.8GHz33dBm (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	-10C to 40C
Weight	~32g (Air Unit + Camera Module)
Dimensions (Transmission Module)	33.533.513 mm

Packing List

• 1 Defender25 O4 HD BNF

• 1 Defender25 550mAh Battery

• 1 Type-C Charging Adapter

• 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

• Defender 2525 Props

• Type-C Charging Adapter

• Charging Adapter Board

• Defender25 Backpack

• Cable for GoPro Bones

• Defender 550mAh Battery

• Defender 900mAh Battery

Details

Under 249g, compact, 4K video, 6-10 min flight, high-performance antennas, 2.5-inch prop guards.

Compact, lightweight FPV drone under 249g for easy travel. Defender 25 redefines adventure with HD performance.

Crash-protected quick-release battery: 550mAh/6min, 900mAh/10min hover flight time.

iFlight Defender25 O4 4S FPV has built-in high-performance video/receiver antennas, 5500-6000MHz bandwidth, 3.4dBi gain, and 69.64% radiation efficiency.

High-performance BLITZ F7 AIO with secured XT30 battery plug, anti-spark filter, and durable 2.5-inch propeller guards for iFlight Defender25 O4 4S HD FPV.

All ports and buttons are easy to access: AIO boot, FC port, receiver binding, SD slot, USB, GoPro power supply, mini camera mount.

Don’t Miss Top Accessories. Commando 8 ELRS Radio, Defender 25 5500mAh Battery, Defender 25 9000mAh Battery, DJI Goggles 2, M4 AC Battery Charger, Defender 2525 Props, Defender 25 Duct, Defender 25 Charging Adapter, Defender 25 Type-C Charging Adapter. It’s finally here, the iFlight Commando 8 with fully integrated iFlight ExpressLRS hardware. Buy Now. These accessories enhance performance and functionality for optimal use.

Defender 25 O4, BLITZ SPLIT GPS, GoPro Bones Cable, Defender 2525 Props (2 pairs), Type-C Charging Adapter, Defender 25 550mAh Battery included.

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