Material: steel/zinc-alloy Finish: Walnut, Crack black, Silver, Oxidation brush, Oxidation black and brushect. Or required Packing: 1piece/carton 1. Connecting electrical wire and data wire function after opened. 2. Advantage: Opening is easy and slowly, safety and facility connection, noiseless, 3. usage: Equipment for office table furniture or kinds of situation. 4. Preparative installation 1. No water soak into 2 .Input:: 180V-220V/50HZ, must have earth wire.