Feature: 1. Press the red button for emergency alarm, COM and NO are connected; the key is reset, the red button reset, COM and NC are connected, and the normal state is restored. 2. Adopts flame‑retardant PC material, high temperature resistant and corrosion resistant, not easy to deform. 3. Humanized design, in line with physical engineering design, elegant touch feeling, convenient to use. 4. The button has been tested many times to ensure that there is no delay, and the service life up to 100,000 times. 5. Wide application, applicable to hotels, hospitals, public shopping malls, family residences, etc. Specification: Item Type: Door Exit Button Material: PC Flame Retardant MaterialSize(L x W x H): Approx. 86 x 86 x 30mm/3.4 x 3.4 x 1.2inPower Supply Voltage: 12VDC Contact Output: NO/NC/COM Maximum Current: 3A Durability Test: 100,000 Times Installation Method: Surface Installation Applicable Temperature: -20℃-+55℃ Applicable Humidity: 0-95%. Package List: 1 x Door Exit Switch1 x Key2 x Install Screw