Tuya WiFi Smart Door Sensor Wireless Magnetic Door Open/Closed Detectors Automation Home Security Alarm Via Alexa Google Home {2.4GHz WiFi One-click connection and easy setting} you can easily realize the intelligent control of home appliances, simple operation Without the home gateway,easy to use. The 2.4G Hz protocol is more stable, faster, and more convenient. {Check the status of doors and Windows} When the doors and Windows are open or closed, the device will trigger and push the notification to the mobile phone. {Linkage Alert with more sensors} Set scenario: In leave-home mode, if someone breaks in, the device will trigger and push the notification to the phone, and the IP camera (not included) will shoot the video;Open the lights automatically when someone opens the door. {APP remote control} Home in hand, anytime and anywhere {Easy to install} small volume, easy to install adhesive installation, can be flexibly placed in a variety of doors, Windows, drawers and other places, will not destroy the appearance and structure of the original furniture specifications: Input voltage: 3V LR03 Static current: ≤ 45 uA Alarm current: ≤ 130 mA Low power undervoltage: ≤ 2.4V WiFi802.11 b/g/n