Tuya Smart WiFi Door Sensor Smart Home Open Close Detector Compatible with Alexa Google Home •[Wifi+Bluetooth Dual Mode] Connect to the network faster,2 times faster than using Wifi alone (Bluetooth is only used for network signal connection,Bluetooth cannot be used alone. WIFI+Bluetooth is more stable) •[Instant Notification] Push instant notification to your mobile phone immediately when the door or window is opened or closed. Keep informed at all times •[Alarm Record] Supports viewing the opening/closing record and battery power on the app. Never worry about missing any important moments or running out of battery •[Low Voltage Reminder] When the battery is low,it will automatically remind you to replace the battery,and you never have to worry about running out of battery •[Smart Linkage] The wifi door magnet can be linked with other smart devices in the home to make your home smarter. Low advantage design to ensure long-term battery life. For example,when the door is opened,the light will automatically turn on. (Note that the light needs to be used with the WIFI switch) •[Third-party voice support] This sensor supports for Amazon Alexa and Google Home Assistant •[Easy to install] Small size,easy installation,adhesive installation,can be flexibly placed in various doors,windows,drawers,etc.,without destroying the appearance and structure of the original furniture •Specifications: •Input voltage: 3V LR03 •Quiescent current: ≤45uA •Alarm current: ≤130mA •Low power undervoltage: ≤2.4V •Wireless network: 802.11 b/g/n •Magnetic control distance: ≥15mm •Battery: DC 3V LR03 (AAA battery,not included) •Alarm method: Mobile phone APP notification push (Smart Life/Tuya Smart) Package included: •1 x Sensor •1 x Receiver •1 x English User Manual