Features: 1.This door exit button is non?touch type, no need to touch it, and it has infrared sensor, which is convenient. 2.Widely used in access control systems, you can use it in home, shop, office and so on. 3.With blue backlit sensing switch, adopt infrared optical technology, when the light is insufficient, you can accurately find the position of the switch. 4.With easy installation, surface mount type, no complicated steps, which is very convenient. 5.With LED indicator, the blue LED indicator is on represent the status standby, and the green LED indicator is on represent the status in use. Specification: Condition: 100% Brand New_x000D_ Item Type: Infrared Door Exit Button_x000D_ Color: Black_x000D_ Material: ABS Plastic_x000D_ Installation: Surface Mount_x000D_ Output Contact: No / Nc / Com_x000D_ Blue LED Indicator: Standby_x000D_ Green LED Indicator: Activity_x000D_ Size: Approx. 83x54x20mm/3.3x2.1x0.8in_x000D_ Rated Current: 3A at 12-24V DC MAX_x000D_ Output Contact: NO/ NC/ COM_x000D_ Mechanical Life: 500000 Tested_x000D_ Induction Distance: Approx. 5-15cm2x5.9in_x000D_ Working Temperature: -10-55(14-131)_x000D_ Working Humidity: 0-95% (Relative Humidity) PackageList: 1 x InfraredDoorExitButton 1 x Installation Screw Pack