General description This Wireless Motion Sensor Door Chime is designed to enhance security and provide alerts for various environments, including homes, offices, schools, and businesses. It features a motion sensor alarm and door chime, ensuring that you are notified of any activity at your entrances. With a built-in LED indicator and vibration function, it offers both visual and silent alerts, making it suitable for different situations. Technical specifications 17 distinct ringtones 5 adjustable volume levels Wireless range: 918FT/280M in open areas 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 Powered by battery or USB, allowing for easy setup without complex wiring Simple installation process, can be