Smart Vibration Sensor: Real-time monitoring and smart linkage Real-time remote monitoring: Receive instant notifications on your smartphone whenever the Door/Window Sensor detects movement from objects or animals, no matter where you are Smart Alerts Notice: Get instant push notifications to your phone when the door sensor detects activity View the history records: Message notifications are automatically saved for easy access to on and off records Linkage equipment: Lights turn on automatically in the evening, such as the living room, so you don't need to find the switch in the dark Wireless Protocol: Zigbee 3.0 Acceleration range: ±2g Tilt alarm: ±10° Working Voltage: 3V Battery Type: CR2450 Standby Current: ≤10μA Standby Time: ≥15 months Working Temperature: -10°C to 55°C Working Humidity: 0%–99% RH Color: White Material: Plastic Package Contents: 4 x Tuya ZigBee Smart Vibration Sensor Note: The package includes only the items listed above. Other products are not included. Note: Light reflection and different display settings may cause slight color variations between the image and the actual item. Measurement error allowed is +/- 1–3 cm.