Features 1、The alarm button Release Emergency Break Glass helps to save lives in emergency situations. 2、Support Electric Control or Access Control System. 3、Made of flame‑retardant PC material, very convenient and safe. 4、Witnesses only need to break the panel glass of the fire safety alarm button to send the fire alarm signal to the controller and send part of the fire alarm signal. 5、It is a better protector at home, shop and other places, and if they take preventive measures and prepare in advance, it is much better for the public and for us. Specification Features: The alarm button Release Emergency Break Glass helps to save lives in emergency situations. Support Electric Control or Access Control System. Made of flame-retardant PC material, very convenient and safe. Witnesses only need to break the panel glass of the fire safety alarm button to send the fire alarm signal to the controller and send part of the fire alarm signal. It is a better protector at home, shop and other places, and if they take preventive measures and prepare in advance, it is much better for the public and for us. Specifications: Control mode: glass breakage trigger Connection Port: Common End, Normally Closed End, Normally Started Transmission power: <4000W Use temperature: - 50 ~65 ℃ Plastic Material: New Flame Retardant PC Plastics Contact Output: Normally Open and Normally Closed (NO/NC) Interface Standard structure: imported high quality stainless steel Electrical Performance: Maximum Durable Current 3A@36V DC Durability Tests: 1 million Durability Life Applicable temperature: -10 ~55 ℃ (14-131F) Applicable humidity: 0-95% (relative humidity) Application Type: Hollow Door Frame and 86 Embedded Electric Box Size: 8.6*8.6cm/3.4*3.4in Package Weight: 147g/5.2oz Package List: 1 * Emergency Button 1 * Installation Kit 1 * User Manual