Main Features: One Remote Doorbell Button, Two Plug-in Doorbells with 3 different melodies each With this doorbell kit, you will not miss a visitor / customer / friend / client even you are in different room or floor Suitable for Two-flats House, Office, Unit, shop, warehouse, shed, Garage etc Remote control distance up to 50 meters Powered by 1 x 23A battery for the remote button(Included) Doorbell powered by AC 200/220V (Europa 2-Pin Plug in type) Packing details. 1) Each into a poly-cover with printed insert card 2) Carton Size (cm): 51 X 48 X 32 3) Pcs/CTN: 50pcs. 4) G. W.: 14 kgTrademark: CONSTA Model: NS-9688C