5 volumes and 36 ringtonesProvide different melodies such as chords, jazz, folk music, etc. The volume can be adjusted from 0 dB to 110 dB. You can set different ringtones for each receiver of each transmitter.Long rangeThe doorbell can reach a maximum outdoor range of 300 m. In addition, the device can also be used as a care aid for the elderly or patients.IP55 waterproof: the transmitter is splash-proof, which ensures optimal use outdoorsConvenient and fast: the receiver can be easily connected to the socket. When someone is on the door, press the button (the transmitter flashes blue), the bell rings and the blue light flashes to visually notify you (good for hearing impaired). Each receiver can set a different ringtone.Easy installation: the button can be attached to the door frame with screws or double-sided tape. The receiver is connected directly to the power source that needs to hear the sound, and the transmitter contains a built-in battery (the battery life is approx. 2 years). This kit can be used in homes, villas, offices or commercial areas.