... TECHNOLOGY 5, Easy Installation Special Features:1) Exquisite design with LED indicator on receiver2) Anti interference technology used. (digital coding ... no labour involved. (wireless doorbell)6) Easy mobility, suitable for house, villa, office, hotel, food joints, dormitory, factory etc ... W/CTN(KGS)QTY/20FTQTY/40GPA3-C1(C2,C3).AC wireless doorbeel53.5X38X55.96013.811.11440030960A3-C4AC wireless ...