and Simple to change mode, speed, and brightness by pressing 3 keys of the item Max.current: 12A Max.power: 144W Voltage: DC 12V Size: 4.2 x 1.2 x 0.3 cm Material: Acrylic Keys description: 1. MODE key: dynamic mode key. Press Mode key to switch 5 dynamic effects. time you press the key, it switches to some dynamic effect. 2. LIGHT key: steady-on mode. 3. SPEED/BRIGHT key: function adjustment. Under MODE state, press the key to adjust the speed of dynamic mode. SPEED devides into 5 levels, one press means one speed. Under LIGHT state, press the key to adjust the brightness of light strip. BRIGHT devides into 8 levels, one press means one brightness. Package Contents:1 x RGB LED light controller 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.