Fine workmanship and stable performance. Automatic control, saving energy. High sensitivity and strong practicability. Durable in use. Used in corridors, toilets, warehouses, stairs, etc. Type: Controller Voltage: DC12V-24V Channel: 28 channels Wattage: 15W per step 420W for all steps Function: Adjust mode/brightness/delay time/speed Application: Control Stair Light Bar material: plastic color: White Package Contents: 1 x Controller 2 x Sensing Cable 2 x Extension Cable 1 Cable 1 x Screwdriver 2 pair Screw Kits 2 x Snap Fixing Kit Only the above package content, other are not included. Note: Light reflection and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.