Features: *Wireless WIFI exit switch button for Sonoff is used for access control(electronic lock, magnetic lock,etc.), hand press or APP remote control door open. *App Support: Free iOS and for Android mobile App eWeLink. *Timing: Supports scheduled timing tasks to turn on/off at specified time. *Voice Control: Compatible perfectly with Amazon Alexa and for Google Home. *Widely used in public entrance gates, public door, home, apartment, office, hotel, etc. *Made of fire-retardant ABS, durable to use. Easy to install and operate. Specifications: Working Voltage: 12V/24V, 80mA Output Contact: NO/COM Type: Automatic reset Mechanical Life: 100,000 test Transmission mode: Wi-Fi 2.4GHz communication Wireless Standard: 802.11 b/g/n Security Mechanism: WPA-PSK/WPA2-PSK Material: Fire-retardant ABS Suitable for: NO electric/magnetic lock Application: Apply to all kinds of gate frame Operating temp -10~+55 degree(14-131F) Suitable Humidity 0-95% (relative humidity) Item Size: Approx. 86 * 86 * 32mm (L*W*H) Item Weight: Approx. 74g / 2.6oz Package Information: Package Size: Approx. 12 * 10 * 3.5cm / 4.7 * 4 * 1.4in Package Weight: Approx. 76g / 2.7oz Package List: 1* Smart Door Exit Button