APP Remote Control: Simply download the Smart Life / Tuya APP on iOS or Android to add the motion sensor device, no hub required. Always keep your home security at your fingertips. Advanced motion sensor: This PIR sensor detects the movements of people and pets, featuring a detection angle of 120 degrees and a maximum detection distance of 5 meters, ensuring real-time monitoring day and night. Emergency alert function: When motion is detected, notifications will be sent to your phone, keeping you informed about your home situation even when you're away. Voice control and history tracking: Compatible with smart voice assistants. Easily control connected devices using your voice. You can also review the activity history of the sensors. High performance and ultra-long standby time: Features a long transmission distance, high sensitivity, and robust network signal. Extremely long standby time. Powered by 3 x 1.5V batteries (included), it can last 3-5 months.