General description This Wireless Motion Sensor Door Chime is an innovative solution for enhancing security in various environments such as homes, offices, businesses, schools, and more. It features a motion sensor alarm and door chime that ensures your property remains secure and well-protected. With a built-in LED indicator, it visually signals when the sensor is triggered, providing an extra layer of awareness. The device also includes a vibration function, making it ideal for situations where noise needs to be minimized. Technical specifications 17 distinct ringtones 5 adjustable volume levels Wireless range: 918FT/280M in open area Motion detector rotation: 360 degrees left to right, 180 degrees top to bottom Power requirements: Infrared sensor needs 3 AAA batteries; receiver needs 3 AA batteries Compatibility and accessories Expandable system: can add up to 32 transmitters (e.g., motion sensors, magnetic sensors) Can add up to 8 remotes Installation Effortless setup with no