Feature: 1. Enhanced Home Security: Protect your home with the door open closed detectors, which use wireless window detectors and door open contact sensors to provide extra security. 2. Intelligent Compatibility: With for ZigBee technology supports smart connectivity, and this door and window anti theft sensor can be compatible with your smart home system. 3. Tamper Proof Design: Equipped with an anti tamper door magnet, sensitive and fast response, triggering immediate alarms and notifying your smartphone to prevent intrusion. 4. Push Alarm Notifications: With the push alarm feature, you'll receive immediate notifications on your smartphone whenever a door or window is opened, allowing you to take swift action. 5. Easy Installation and Versatile Application: Simple to install and operate, suitable for various scenarios such as doors and windows. Specification: Item Type: Door Sensor Window Sensor Material: ABS Detects door, window open, close status and sends notifications to your phone Tamper alarm function with notification when device is removed USB Power: 5V 1A Standby Current: 10.7ua Operating Temperature: 0°C ~ 40°C (32°F ~ 104°F) Operating Humidity: 20% ~ 85% Wireless Frequency: 2.4GHz Wireless Protocol: For Zigbee 3.0, IEEE 802.15.4 Network Range: Approx. 55m/180ft Product Dimensions: Main Body: Approx. 82mm x 27mm x 23mm/ 3.2in x 1.06in x 0.91inAuxiliary Machine: Approx. 50mm x 13mm x 16mm/ 1.97in x 0.51in x 0.63in Battery: CR123A Lithium battery x 1 . Package List: 1 x Main Host 1 x Sub Host 3 x Screw 3 x Screw Accessory 1 x User Manual 2 x Adhesive Tape 1 x Data Cable