1Witnesses only need to break the panel glass of the fire safety alarm button in intensity to send the fire alarm signal to the controller and send part of the fire alarm signal. 2Sandblasting panel, elegant style. It is the best protector compatible home, shopping mall and other places. 3Use fire-proof materials to meet safety requirements. 4Use durable plastic shell, easy to install. 5Support electrical control or access control system.Glass breaking button, also known as emergency button, is connected in series on the electric lock ring to prevent the hardware failure of card reader, button or controller in the access control system, and the personnel inside can not open the door.Features:New emergency release alarm button compatible broken glass. Support electrical control or access control system. Use durable plastic shell, easy to install. Use fire-proof materials to meet safety requirements. Sandblasting panel, elegant style. It is the best protector compatible home, shopping mall and other places. Witnesses only need to break the panel glass of the fire safety alarm button in intensity to send the fire alarm signal to the controller and send part of the fire alarm signal. Specifications:Control mode: glass breakage triggerConnection Port: Common End, Normally Closed End, Normally StartedTransmission current: Transmission power: Transmission Voltage Range: 1V-250VUse temperature: - 50 ~65 Plastic Material: New Flame Retardant PC PlasticsContact Output: Normally Open and Normally Closed (NO/NC) InterfaceStandard structure: imported high quality stainless steelElectrical Percompatiblemance: Maximum Durable Current 3A@36V DCDurability Tests: 1 million Durability LifeApplicable temperature: -10 ~55 (14-131F)Applicable humidity: 0-95% (relative humidity)Application Type: Hollow Door Frame and 86 Embedded Electric BoxSize: 8.6*8.6cm/3.4*3.4inPackage Weight: 166g/5.9ozPackage List:1 * Emergency Button1 * Installation Kit1 * User ManualNote:Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind becompatiblee ordering.