KnightsBridge Wireless door chime

Wireless Doorbell System: Battery powered solution with easy installation - place the receiver anywhere and mount the bell push by your front door, with no wiring required. Customisable Alerts: Choose from 58 ringtones with adjustable volume up to 110dB, plus a visual alert for noisy environments or hearing assistance. Reliable Wireless Performance: Operates on 433MHz with learning code technology to prevent interference from nearby wireless devices. Flexible & Expandable: Compatible with additional plug-in receivers or bell pushes, offering a wireless range of approximately 150–200m (dependent on environment). Durable Indoor & Outdoor Design: IP44 rated receiver (wall mountable or freestanding) and IP55 rated bell push, designed to perform in temperatures from -20°C to +50°C., Manufacturer: Knightsbridge