General description No more worrying about batteries with our Wireless Doorbell featuring unique PUSH-RF technology. This innovative doorbell converts kinetic energy into an electrical signal, allowing it to ring wirelessly. It is more convenient, energy-saving, and practical than traditional doorbells. The doorbell kit includes two plug-in receivers, ensuring you never miss a visitor. Technical specifications Waterproof rating: IP44 Operating temperature range: -20℃ to 65℃ Wireless range: 150M/500FT Volume levels: 4 adjustable levels from 0dB to 100dB Number of chimes: 38 classic melodies Other information LED temperature display shows Celsius/Fahrenheit when not ringing Made of ABS, non-toxic, safe, and recyclable Ideal for various settings: home, office, hotel, hospital, school, etc.