4.5V and 5V circuit separation design to avoid current overload and damage to the device when adjusting parameters; 9V BEC programmable switch to flexibly control the image transmission power supply Storage capacity, 128MB large-capacity black box fully records flight data and supports long-term fault tracing Full-pad direct plug-in interface + resistor protection, peripheral connection is more convenient, and the main control chip's surge resistance is significantly enhanced 2oZ thickened copper PCB process, the overcurrent capacity is increased by 50%, reducing electromagnetic interference. A large number of capacitors filter, the circuit signal is cleaner, and the chip works more stably. The triple protection of magnetic beads, tubes, and high-voltage DC chips effectively suppresses the impact of motor back electromotive force, and the flight control board is not easy to burn out Hign-concerned Chemical:None Name:FOR RadioLink For Vehicle Type:Airplanes Size:30.5x30.5mm Model Number:F405 Processor:STM32F405RGT6 2S-6S The product appearance and printed words depending on the batch, but this does not affect use. Specification:INAV firmware Color:As Shown Material:PCB Package Contents: 1 * F405 ESC Flight Controller Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.