Adopts UK's CSR Bluetooth slave module with high stability and stable signal; With regulated power supply can connect to UART TTL port of MWC directly easy to adjust parameters; Function: Read and adjust all PID parameters; Read and adjust AUX1/AUX2 Switch setting; Monitor remote controller signal and output control signal of flight controller board; Monitor signal between GPS output signal and Gyro acceleration meterpressure meter and other sensors; Calibrate magnetic resistance and acceleration sensor; Read and save MWC parameter via cellphone; Support screenshot; This Bluetooth module is compatible with all MWC flight controllers 328P flight control board connect UART serial port and Mega flight control board connect serial 0 Port; Support transparent data transfer function also can be used with other devices; LED State indicator: Green: Power supply indicator continuous lighting when power on; Red: Flashing indicates no connection continuous lighting indicates connect success; VVC voltage: 3.3V