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.