Wireless Digital Door Music Ring Bell 32 Melody gray

Features: User friendly, simple design, no need to ask for professionals or installers help, completely free of renovation costs. Multi purpose.The receiver also has an ultrasonic mosquito repellent function. With constant voltage circuit design, it has high efficiency and energy saving effect, effectively increasing the service life by more than 50percent . The doorbell consumes less than 3W, and the transmitter uses a 12V volt 23A battery. There are factors affecting the use of the doorbell as follows:electromagnetic interference, installation on a closed iron door, shielding, weather and humidity, and no timely replacement of the battery. It has a wide range of uses, not only regarded as a general doorbell, but also be used for special