Silver stainless steel shell, safe and . Looks simple, comfortable and beautiful. Undergoing 50,000 times continuous clicking test, very . Good to touch, easy to operate and use. Activates electric strike, magnetic lock or other elctric lock via access control keypad. Works with most electronics access control keypads, door phones with access control keypads. Flush mounting. Current: 3A, 36V DC Contact output: NCCOM Applied temperature: -10 ~ + 55 Celsius(14-131F) Applied humidity: 0~95% (relative humidity) Material: Stainless steel Color:Silver Item size: 9 x 2.5cm (L x D) Weight: 120g Package including: 1 x Door Switch Button 2 x Screws 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.