【Latest RF Push Technology and Battery-Free】This wireless doorbell is self-powered, requires no wires or batteries, protects the environment and saves money. When the transmitter is pressed, it generates its own electrical current and sends a stable signal to the receiver. You never have to worry about damaging the wall or the doorbell again when changing batteries!

【38 Ringtones and 4 Volume Levels】Our wireless stereo doorbell speaker provides a rich and clear sound. It offers a wide range of 38 ringtones and 4 volume levels (including silent) to suit your personal taste. Press and hold the volume button to return to the first ringtone (Dingdong). With the memory function, the wireless chime remembers your last settings after a power outage.

【No Cross-Talk and False Alarms】This small wireless doorbell has strong penetration power and anti-interference. The range for multiple obstacles is up to 152 m (500 ft) and in open areas up to 305 m (1000 ft). It does not affect other devices in your house or at the neighbors' and ensures that you never miss a visitor, even if you are a few rooms away or on another floor.

【Easy Installation】Simply connect the small receiver with a plug and attach the transmitter to a wall with the included accessories, including 2 screws and a piece of tape. Our doorbells can be used for home, apartment, school, holiday home, office and more. This wireless battery-free chime is also an excellent Christmas gift, birthday present or anniversary gift for any homeowner or business owner.