This white wireless digital door chime is ideal for any home, offering practicality and durability. It requires no wiring and is easy to install. With a range of up to 100m and 25 available melodies, it's a convenient addition to your home. It plugs directly into any wall socket, making it ready to use immediately. The package includes two push-button transmitters, each requiring 2 x 3V CR2032 lithium batteries, which are included. These transmitters are suitable for both front and back door installations.