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, monitoring in real time possible day or night. Emergency alert function: When motion is detected, alerts will be sent to the phone, to know what is happening at your home even when you are on the go. 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.