1、Adopting 0.9mm thickness stainless steel material, high strength and long use life. 2、Adopt the key to rotate the button to switch the door lock, no worry about its safety. 3、Attractive appearance because of the unique metallic beauty of stainless steel with the surface drawing treatment. 4、Universal key switch. it can be used in all gate, garage door or other emergency exit. 5、Simple installation, just connected the panel connecting line with the system, the key can be used to control the switch. 1 x Switch Panel2 x Key2 x Screw Item Type: Door Key SwitchMaterial: Stainless SteelPanel Size: Approx. 86 x 86mm/ 3.4 x 3.4 inBack: Approx. 25mm/1in bulgeType: NO/NC/COMWiring Mode: Welded tail wire, four wire outputKey Switch: 2 round keys, the key is universalPower Supply Voltage: DC12VHow to Use: After the panel connecting line is connected with the system, the key can be used to control the switch.