1. VR speed control port connection method can be controlled by voltage regulation control or PWM control speed voltage regulation can be adjusted by the adjustable resistance (20K 3 pin bit VR port side of the port side of the 5V port to connect to the GND port through the regulation of voltage control) 2. positive reverse port connection method to connect 5V a direction to the direction of GND 3. Singnal speed pulse output port output of a circle of pulse = motor pole number x 3 4. 5V control terminal 5V voltage output port. Drive plate type: JYQD_V6.3E1 Voltage range: 12V-36V current: 20A Drive power: less than equal 500W (related working voltage) Speed control function: voltage speed regulation or single chip microcomputer control PWM speed regulation Power end connection: 1, VCC power positive input port (12V-36V) 2, GND power input port 3, brushless DC motor without a sense / no motor three line W 4, MB brushless DC motor without a sense / no motor three line V 5, MA brushless DC motor without a sense / no motor three line U size: 6.3 x 4.3 x 1.7cm Material:PCB colour:blue Package Contents: 4 x motor controller 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.