iFlight Defender 25 O4 4S HD | FPV Drone |

Functional FPV drone weighing under 249g

iFlight Defender 25 is a lightweight and stable drone of the cinewhoop type, designed for flights in places requiring particular caution. Thanks to a take-off weight not exceeding 249g , the device complies with many aviation regulations, making it a practical choice for recreational and semi-professional use. This model integrates the advanced DJI O4 system, offering high-quality HD live view and the ability to record video material in 4K resolution. It is a BNF (Bind-and-Fly) drone , which allows for quick preparation for flight after pairing with a compatible controller, such as the iFlight Commando 8 .

Blitz D25 F7 AIO design and integrated propeller guards

The construction of the defender25 model is based on a frame with durable propeller guards , which protect both the device and its surroundings during FPV flights indoors. At the heart of the electronics is the advanced Blitz D25 F7 AIO controller. The AIO (All-In-One) design integrates the F7 FC and efficient ESCs on a single board, which has made it possible to significantly reduce weight and optimise the space inside the housing. This configuration ensures stable control and adequate power for the drive powered by 4S battery packs. The defender 25 design has been carefully considered so that servicing and replacing components are as simple as possible for the user.

DJI O4 Air Unit Pro system and 4K video quality

The 4S HD version has been equipped with the latest DJI O4 Air Unit Pro , which redefines the standards of digital transmission in drones of this class. This system provides a crystal-clear HD image transmitted directly to goggles such as the Goggles 2 or newer DJI models. The camera allows stable 4K footage to be recorded while maintaining a wide field of view, which is crucial in FPV productions. Thanks to image stabilisation and a high bitrate, the iflight defender 25 is a suitable alternative to larger units, while retaining agility similar to DJI Avata -type devices, but in a more open and configurable form.

Innovative power system and 900mAh battery

A unique feature of the defender25 is the dedicated battery mounting system, which eliminates the need for traditional Velcro straps. A special latch mechanism makes it easy to swap cells quickly, which is very helpful during intensive FPV sessions. The user can choose packs with a capacity of 550mAh to keep the weight as low as possible, or 900mAh to extend time in the air. The set also includes an adapter that allows batteries to be charged with standard model chargers. The entire 4S power system has been optimised for motor efficiency, resulting in smooth and predictable flight.

Additional features and GPS safety

Despite its small size, iflight has ensured that the drone is equipped with a GPS module. This function allows the device’s position to be monitored in real time and supports rescue systems in Betaflight software, increasing safety during outdoor flights. The drone also has a built-in ELRS (ExpressLRS) receiver, which, together with the Commando 8 ELRS radio, provides a stable control link over long distances. The Defender 25 is a tailored solution for people who need equipment ready to work in difficult spaces, where every gram of take-off weight and FPV control precision matters.

Technical data

Key advantages:

• Low take-off weight of 249g allowing flights without additional qualifications in many regions.
• DJI O4 system providing the highest available quality of digital HD live view.
• Safe design with full propeller guards, suitable for flying close to people and obstacles.
• Quick battery replacement thanks to an innovative mounting system without Velcro straps.
• Efficient Blitz F7 AIO electronics guaranteeing stability and precise handling.
• Ability to record 4K without the need to mount an additional external camera.

The product is intended for:

• Video content creators looking for a lightweight tool for cinewhoop-style shots.
• FPV pilots needing a safe drone for indoor training.
• Beginners who value ready-to-fly (BNF) solutions with the DJI system.
• Travellers requiring equipment weighing under 250g due to aviation regulations.