AOLIKES Wireless Security PIR Motion Infrared Sensor Detector for Home Security Burglar Alarm System 433Mhz Detection angle: 60 degree vertical, 110 degree horizontal. No dead spots were left when installed in the corner of a room. Detection range is up to 25ft (8m), which creates a large motion detecting area, and it will trigger the alarm system to alert you when someone or animals enter and move in the monitored area. Works completely wirelessly, so it can be installed at any location in your house or business to provide a second layer of protection, or cover the area that cannot be secured by door contacts. Communication distance from the control panel is up to 250 feet away unobstructed. The antenna can be drawn out to maximize its transmission range. Compatible with all 433Mhz wireless alarm host system, cannot work alone. Operates with a 9V 6F22 battery. ON/OFF Switch and low battery indication. After detecting motion, the sensor "sleeps" for 5 seconds, good for saving the battery. What you get: a 433M wireless PIR sensor, User Guide with 12-month warranty and intimate customer service.