The working voltage is 6-80V, and the anti-reverse connection protection is supported, and the module not be damaged due to the power line reverse connection. The module is bare by default. If the motor is driven below 5A current, it does not need to be forced to dissipate heat, but only needs to normal ventilation. If current exceeds 5A, it must be forced to dissipate heat. Onboard LED indicator for standby, working, error and other states. Onboard potentiometer (0.5-5V),PWM speed control interface (frequency 1-20KHz), duty cycle 10-100%. Onboard FG speed feedback interface, calculation speed RPM=FG frequency Hzx60/pole number. This product is a non-inductive BLDC motor driver module developed for SNR8503M drive chip, the chip is integrated with non-inductive motor driver special circuit, with simple peripheral circuit, perfect function, small size, simple debugging, high driving efficiency, flexible application, wide application and so on. Onboard CW/CCW steering interface, suspended for clockwise CW, short-circuited GND for counterclockwise CCW steering. Onboard UART serial port. Users can control the module through the serial port protocol. Onboard burning interface for updating the burning program. Operating voltage: 6-80V Maximum current: rated 20A 50A Maximum power: 1600W Is it Hall: No Hall Control mode: PWM / serial port Other performance: overcurrent protection & stall protection & power reverse protection Applications:Pumps, medical equipment, all kinds of compressors, all kinds of fans/fans, electric screwdrivers, electric curtains, automatic doors, hydraulic oil pumps, air pumps, refrigerators brushless DC compressors, lawn mowers, sprayer, underwater thrusters, etc. Colour:Black Material:PCB Package Contents: 1 x Motor driver board 1 x Potentiometer with cable (The color and appearance of the cable are random, and specified color and appearance are not accepted)1 x Heat sink 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.