*Smart wireless Ding Dong doorbell,full digital frequency modulation technology,never code stringing.*28 chord ringtones to pick out from and 3 step volume adjustable,eye catching LED light flashes when a person catapults the doorbell,perfectly suited to the elderly,deaf and expecting a baby women.*Ultra low electric power usage design,power saving and also lasting.With ABS material and also huge brightness of surface,a fabulous and trendy doorbell for the home of yours decoration.*Ultra long distance control,strong penetration and also sound signal.*Simple not too difficult to operate,perfectly place for apartment,villas,home,hospital and also numerous additional essential locations.