Smart Vibration Sensor:Smart sensing,Real-time monitoring,Smart linkage Real-time remote monitoring:Wheneyer and wherever you are,once Door/Window Sensor detects external,objects or animals, you receive a notification by smart phone. Smart Alerts Notice:Get Instant Push Notification to Your Phone When Door Sensor Detects Activity. VIEW THE HISTORY RECORDS:Automatically save message notifications,Easily view on and off records. Linkage equipments:Open the the evening , the living room turnon,automatically no need to find the switch inthe dark Wireless Protocol:Zigbee3.0 Acceleration range:± 2g Tilt alarm:±10° Working Voltage:3V Battery Type:CR2450 Standby Current:≤10uA Standby Time:≥15hh Months Working Temperature:-10℃~55℃ Working Humidity:0%-99%RH Color: White Material: plastic Package Contents: 4 x Tuya ZigBee Smart Vibration Sensor Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.