Wireless plug-in motion activated alert system. Simply plug the receiver in the desired position and mount the motion sensor in desired position, 110° detection angle and 5m range. 58 ringtones to select from. Volume control (up to 110dB). Eye catching visual alert on receiver when ringtone cant be heard. Hassle free installation, no running any wires. Additional receivers and bell pushes are available to expand the system if required. Mains powered receiver. Battery powered IP20 Motion Sensor (batteries not includedrequires 2 x AA). Range of approx. 75-150m depending on environment. Plug-In Chime 58 Melodies 110° 5m PIR Sensor Range 100m Range Up to 16 Chimes Supported Adjustable Volume Plug-In Chime 58 Melodies 110° 5m PIR Sensor Range 100m Range Up to 16 Chimes Supported Adjustable Volume