1. PCB board size: 100x58mm, designed with double-sided FR-4 1.6MM board. 2. The main filter capacitor adopts 450V/150uF high-frequency low-resistance capacitor (temperature resistance 105) dedicated for power supply. 3. The motor speed can be controlled by the on-board potentiometer or the output PWM port of single chip microcomputer (terminal 2.54-4P). Note: When using single-chip microcomputer to drive, you need to share the ground with the single-chip microcomputer and 5 VDC power supply. 4. There are two groups of VH3.96-6P(2 empty needles) interfaces on the board, which can control two groups of fans (air inlet and air outlet) independently. 5. The module is integrated with EMC anti-interference, lightning-protection and negative temperature NTC anti-overshoot design, and integrated with non-isolated 15V motor for power supply. The new board has been optimized. If you need single-chip control, you only need to connect three wires (FG, PWM, GND). Colour:As Shown Material:PCB Package Contents: 1 * DC motor driver board 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.