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 for 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 for 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 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: 166g/5.9oz Package List: 1 * Emergency Button 1 * Installation Kit 1 * User Manual . Note: Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering.