Wireless Intelligent Self Generating Household Doorbell Remote Control Electronic Doorbell One To Two Features: Material: Our wireless doorbell is made of ABS, recyclable, and can withstand rainwater and high temperatures. Radio range: The doorbell receiver is highly sensitive, and a transmitter button triggers a buzzer. Wireless waves cover the entire house without mutual interference, with an operating range of up to 30M in open areas, ensuring that you can hear the bell and open the door 38 different ringtones and 4 volumes: Our wireless doorbell offers 38 different ringtones, including 4 volumes, with a controllable volume of 0-90dB. Energy saving and: ultra-low power design, sustainable energy utilization. The transmitter battery can be used for a long time. Our wireless doorbell is very. Installation: The doorbell receiver does not require a battery and is easily into a power outlet. The remote transmitter button can be used to secure it to the door frame. Product Description: Specification: Receiver size: 7.8 * 5.4 * 2.5CM Emitter size: 6.6 * 4 * 2.1CM Voltage: 110-220V Power: 0.25W Ringtones: 38 types Volume: 4th gear Receiving distance: indoor 30 meters, open area 200 meters Volume range: 0-90dB The packaging includes: 2 x receiver 1 x transmitter