[Emergency Alert Push Function]When there is movement detected, the alert notifications be pushed to your phone, be aware of what's happening even when you're away. [History Records Tracking]You can track the history of sensor activities. [Strong Performance & Ultra-long Standby Time]Long transmission distance, high sensitivity, and strong network signal. Ultra-long standby time. Powered by 1pcs CR2450 batteries(include), can last for about 18 months. [Advanced Motion Sensor]PIR detects human body or animals that are moving, 120° detection angle, 5m detection distance, can achieve real-time monitoring day or night. Please note: This product must be used with a Zigbee gateway! (not included), Weight: 0.0551155655 Pounds, Manufacturer: Qusedwey