Wireless Doorbell, Waterproof Chime Battery Power Loud Door Bell Kits with 1 Push Button 3 Plug-in Receivers – 55 Melodies for Home Classroom Door Entry Chime

【Wide Wireless Coverage and Unlimited Expansion】This wireless doorbell has a range of up to 1300 feet (400 M), which is enough to cover every door in your home or store. It has multiple learning codes and a stable signal scheme with strong anti-interference ability, and can be paired with other wireless doorbells for unlimited expansion. You can also pair different chimes with different buttons so that you know exactly which door is triggered.
【55 Chimes and 5 Adjustable Volume】55 classic ringtones, you can freely choose according to the situation.The volume can be adjusted in 5 levels from 0~110dB, and it can be muted. With LED indicator and memory function: the previously set tune is retained after reinsertion, no need to reset.
【High-Performance Doorbell Kit】IP55 dustproof and waterproof button can easily cope with various climates, operating temperature range: -22°F ~158°F (-30°C ~70°C). The button is powered by a 12V 23A battery with extremely low power consumption and a service life of up to 3 years, so there is no need to replace the battery frequently.