Features: 5V isolate with MCU, and effectively protect MCU; 5Vpower indicator on boards. Voltage indication ofMotor Driver output end; can solder heat sink. Just need four lines from MCU to driver module (GND. 5V. PWM1. PWM2); isolation chip 5Vpower supply (can share with MCU 5 V). Able to reverse the motor forward, two PWM input frequency up to 25kHZ; two heat flow passing through an error signal output. Isolated chip 5Vpower supply (can be shared with the MCU 5V), can also use the on boards 5V supply; the supply voltage 5.5V to 27V. Specifications: Material:ABS Size:Approx.5x5cm/1.97x1.97in Note: Please allow 1-2cm errors due to manual measurement,pls make sure that you do not mind before you order. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes: 1Set BTS7960Motor Driver Module