Fangrui Product Details Tuya Wifi Smart Door Sensor Wireless Magnetic Door Open/closed Detectors Automation Home Security Alarm Via Alexa Google Home Description: {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