... selection.5) Easy instillation, no wiring needed, no labour involved. (wireless doorbell)6) Easy mobility, suitable for house, villa, office, hotel ... .W(KGS)QTY/20FTQTY/40GPB1-C1,C3DC wireless doorbeel57.5X31.5X356012.210.82550054900B1--C4DC wireless doorbeel52.5X32.5X71.56017.815.11320028500 DC ...