ZS-X4A Style DC Motor Speed Regulator controls the speed of a DC motor by adjusting Pulse-Width-Modulated (PWM).< />Super style item with the latest low voltage technology.< />Adjustable speed range is 1%-100%.< />Incorporate a 30V 2.5A fuse, and with the protion function of rese supply.< />It is not only to use for dc motor controls of the speed,but also to use for adjust the LED light.< />< />Material: metal< />colour: red< />size: 30x24x15MM< />< />Package Conten:< />1 x PWM DC Motor Speed Controller Led Dimmer< />< />Only the above package content, other produc are not included.< />Note: Light ing 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.