Sub250 Send T400 is a small analog video transmitter suitable for smaller drones with AIO board. The video transmitter has mounting holes with a 25.5x25.5mm spacing, so it can be conveniently placed above the AIO board. It uses a u.FL connector for antenna connection. Setup is done by button or via the controller using the IRC Tramp protocol. The maximum power of the video transmitter is 400mW. The video transmitter has a connector for connection to the flight controller. For soldering enthusiasts, soldering pads are also available.