With a range of up to 50m you won’t miss your visitors’ call when you have the Byron portable wireless door chime BY112 in your home. Just place the receiver in a position where you can easily hear it, or move it around your house. You can either plug it into the mains or have it free standing with battery power. There is a choice of 4 melodies. Bell push battery supplied. Chime requires 3 X AA batteries (order 1 X 100-4179).