Voltage: DC8V-55V (wide voltage anti-back protection) Speed range: long press / short press to adjust the degree, 0% -100% speed Drive current: up to 10A, (recommended output series 12A fuse) Instructions: 1.Click/long press the "speed increase" button to increase the motor speed to 100%. 2.Click/long press the "speed down" button to increase the motor speed to a minimum of 0%. 3.Press and hold the "Power On/Off" button for one second, the controller will be turned on or off (the power is turned off by default, and the memory function is activated after booting) Wiring: "M+"and "M-" are respectively connected to the positive and negative terminals of the output, M+ is positive and M- is negative. "VIN" and "GND" are respectively connected to the positive and negative terminals of the input terminal, Vin is positive and GND is negative (input power supply voltage is DC8V-55V) Colour:black Material:ABS+electronic components Size:70 x 40 x 23mm Package Contents: 1 x -331 DC 8-55V 10A PWM Motor Speed Controller Only the above package content, other products are not included. Note: Light 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.