App Remote Control: Just Download The "Smart Life / Tuya" App On Ios Or Android To Add The Motion Sensor Device, No Hub Needed. Home Security Always In Hand.Advanced Motion Sensor: The Pir Detects The Movements Of Humans And Animals, With A Detection Angle Of 120, A Detection Distance Of 5 M, Real-Time Monitoring Possible From Day Or Night.Emergency Alert Function: When Motion Is Detected, Alerts Will Be Sent To The Phone, So You Know What'S Happening In Your Home Even When You'Re On The Move.Voice Control And History Tracking: Compatible With Google Home. Simply Use Your Voice To Control Connected Devices. You Can Track The Activity History Of The Sensors.High Performance And Ultra-Long Standby Time: Long Transmission Distance, High Sensitivity And Strong Network Signal. Super Long Standby Time. Powered By 3 X 1.5V Batteries (Included), Can Last 3-5 Months.