Waterproof wireless doorbell kit, 1 transmitter + 1 receiver (European standard). Ideal for houses, apartments, offices, schools, hotels, or villas. Wireless range up to 150 m (490 feet) to cover multiple rooms or floors. 39 selectable ringtones and 4 volume levels (from 50 dB silent to 100 dB maximum) to suit all situations. LED indicator and silent mode for peace and quiet, built-in memory that retains the last setting after a power outage. IP44 waterproof and weather-resistant: works from -10°C to 55°C, protects against rain and light dust. Easy installation: plug the receiver into an outlet and attach the transmitter to the wall or door frame (adhesive tape or screws). Battery-powered transmitter with a battery life of over 2 years. Key features: wall or frame mounting, 150m range, 39 melodies, adjustable volume, 100dB, notification LED, setting memory, IP44. Package contents: 1 transmitter + 1 doorbell/receiver. Colors: white with blue LED.