... design with LED indicator on receiver2) Anti interference technology used. (digital coding)3) 35 different musics can be chosen by using ... selection.5) Easy instillation, no wiring needed, no labour involved. (wireless doorbell)6) Easy mobility, suitable for house, villa, office, hotel, food ... /20FTQTY/40GPT-6AC Wireles doorbeel62.8X58.8X58.5602015.9750016200 AC Wireless Doorbell