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 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. 1. PCB board size: 100x58mm, designed with double-sided FR-4 1.6MM board. 2. The capacitor adopts 450V/150uF high-frequency low-resistance capacitor (temperature resistance 105℃) dedicated for power supply. 5. The module is integrated with EMC anti-interference, -protection and negative temperature anti-overshoot design, and integrated with non-isolated 15V motor for power supply., Weight: 0.17857443222 Pounds, Manufacturer: Hipzeepo