KnightsBridge Wireless plug in motion activated chime system

Customisable Alerts: Choose from 58 ringtones with adjustable volume up to 110dB, plus an eye-catching visual alert for noisy environments or hearing assistance. Reliable Wireless Performance: Operating on 433MHz with learning code technology to prevent interference from other wireless devices for dependable everyday use. Motion Detection Coverage: Integrated motion sensor with a 110° detection angle and up to 5m range, ideal for monitoring entrances and approach areas. Quick, Hassle-Free Installation: No wiring required. Battery-powered sensor (2 x AA, not included) pairs easily with the mains-powered indoor receiver. Expandable & Versatile: Supports additional plug-in receivers or bell pushes, with an operating range of approximately 75–150m (environment dependent)., Manufacturer: Knightsbridge