1The device can be connected to mobile phone via WIFI (2.4G only), detect abnormal state and push message to mobile phone through APP. 2Detect open/close state of door/window, compatible for Tuya. 3Standby current: 5uA, wireless type: 2.4GHz. 4Protocol: IEEE 802.11b / g / n, WIFI distance: 50 meters. 5Free APP: for Tuyasmart, one-click WIFI set or AP mode to connect WIFI.Features:The device can be connected to mobile phone via WIFI (2.4G only), detect abnormal state and push message to mobile phone through APP. Detect open/close state of door/window, compatible for Tuya. Standby current: 5uA, wireless type: 2.4GHz. Protocol: IEEE 802.11b / g / n, WIFI distance: 50 meters. Operating temperature: -10 C ~ 40 C (14 F ~ 104 F). Free APP: for Tuyasmart, one-click WIFI set or AP mode to connect WIFI. Smart door window sensor, works independently without hub, compatible for Alexa and for Google Home. Specifications:Condition: Brand NewMaterial: ABS plasticColor: Shown as pictureBattery: CR2Standby Current: 5uAProtocol: IEEE 802.11b / g / n Wireless Range: 50 metersWorking Temperature: -10 C ~ 40 C (14 F ~ 104 F)Working Humidity: 20%~85%Storage Temperature: -10 C ~ 60 C (14 F ~ 140 F)Storage Humidity: 0%~90%Standby Time: 6-10 monthsWireless Type: 2.4GHzPackage List:1 * Alarm1 * Accessory