The Byron B304/B305 wireless door chime has a 50 metre operating distance with an 80db rating. It provides a choice of two melodies. Self-learning codes will keep its code even when the batteries run out and are replaced. The door chime can have up to 2 bell pushes controlling the chime.
The Push requires 1 x 23A battery (included).
B304: 1 x Portable Chime & 1 x Wireless Push.
B305: 1 x Plug In Chime & 1 x Wireless Push.
B314: 1 x Portable Chime & 2 x Wireless Pushes.