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 triggerConnection Port: Common End, Normally Closed End, Normally StartedTransmission power: andlt 4000WUse temperature: - 50 -65 Plastic Material: New Flame Retardant PC PlasticsContact Output: Normally Open and Normally Closed (NO or NC) InterfaceStandard structure: imported high quality stainless steelElectrical Performance: Maximum Durable Current 3A 36V DCDurability Tests: 1 million Durability LifeApplicable temperature: -10 -55 (14-131F)Applicable humidity: 0-95 percent (relative humidity)Application Type: Hollow Door Frame and 86 Embedded Electric BoxSize: 8.6x8.6cm or 3.4x3.4inPackage Weight: 147g or 5.2ozPackage List:1 x Emergency Button1 x Installation Kit1 x User Manual.