5V isolate with MCU, and effectively MCU; 5V power indicator on board. Voltage indication of motor driver output end; can solder heat sink. Just need four lines from MCU to driver module (GND. 5V. PWM1. PWM2); isolation chip 5 V power supply (can share with MCU 5 V). to reverse the motor forward, two PWM input frequency up to 25kHZ; two heat passing through an error signal output. Isolated chip 5V power supply (can be shared with the MCU 5V), can also use the on-board 5V supply; the supply voltage 5.5V to 27V. Input voltage: 6V-27V Maximum current: 43A Input level: 3.3-5V Control : PWM or level Duty : 0-100% Input port: 1.RPWM: forward level or PWM signal input, active high 2.LPWM: Reverse level or PWM signal input, active high 3.R_EN: forward drive enable input, high-level enable, low level off 4.L_EN: Reverse drive enable input, high-level enable, low level off 5.R_IS: forward drive current alarm output 6.L_IS: Reverse drive current alarm output 7.VCC: +5 V power output, 5V power supply connection with the microcontroller 8.GND: signal common low end Colour:Photo Color Material: ABS Size: 5 x 5 x 3cm Package Contents: 1 x Motor Driver Module Only the above package content, other are not included. Note: Light and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.