Product features Length: 7 cm Width: 7.5 cm Height: 11 cm Material(s): PVC Color: white Product description This white wireless doorbell is very easy to use since you just need to plug it into an electrical outlet to make it work. No more need for batteries or electrical connections, this very practical little device will surprise you with its choice of 38 melodies and its transmission distance of up to 120m. It also has an adjustable sound level between 3 levels, and a frequency of 433.92 MHz.