The Battery Powered Wireless Door Chime from Arlec features an operating range of up to 50 metres and being wireless and battery-powered, it's simple to install with no wiring required and can be placed anywhere in your home. With its dual receivers, you can easily hear your door chime from anywhere in the house. *********** WARNING – Keep batteries out of reach of children. Product contains a Button or Coin cell battery. The Battery can cause severe or fatal injuries in 2 hours or less if it is swallowed or placed inside any part of the body. If suspected the battery has been swallowed or otherwise placed inside any part of the body, contact the Australian Poisons Information Centre on 13 11 26 immediately for 24/7 fast, expert advice. *********** | Arlec Premium 38 Sound Battery Powered Wireless Door Chime - Twin Pack