This item is a brushed motor controller, it can steady speed and sensitive control of and direction changes. The wires and interfaces are durable, and low malfunction of long time use. The interfaces have instruction labels on for your easy installation. Suitable for electric bicycles, scooter, etc. Rated Voltage: 24V Under-Voltage Protection: 20 +/- 0.5V, 31.5 +/- 0.5V, 42 +/- 0.5V Match Motor: 500 W motor Suitable for: Electric bicycle, scooter, etc Colour: black + white Material: metal Size: 8.3 * 6.5 * 3.7cm Package Contents: 1 * brushed controller 1 * controller long wire handlebar 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 . The measurement allowed is +/- 1-3cm.