Wireless Doorbell Product Features: · Wireless Door Bell : Smart looking housing with flash light. · Simple,vivid and no-wire installation design avoid troubles and save money when in installation and don't effect decorate environment. · Build in anti-interference design, avoid the interference between users. · Build in double speakers, make sound clear,especially suitable for homes,offices,factories,hotels etc. · Remote Control Doorbell Long operating range in open air,suitable for homes and high floor houses depending on the line of sight, obstruction and battery strength. ....Approx 32 Different Musics..... · Dimensions of the remote button is approx. 7.50cm x 4.30cm · Dimensions of the Door Bell is approx. 10.50cm x 7.50cm · Wireless Doorbell is Powered by 2 x AA size batteries for the door bell and 1x 12V type 23A battery for the remote button (included with the package). · Remote Control Doorbell is easy to install, with double-side stickers at theback of the remote button. This Remote is meant for indoor use only. You can use it in homes Shops and offices. · No wiring required. Package Contents: 1 Remote, 1 Bell Unit & 1 Mini Battery (Cell) For Remote.