The Byron DB312/DB313 Twin Wireless Door Chime has a 30 metre operating distance with a 75db rating. It provides a single melody, 'ding dong' chime and operates using a fixed code. It comes with a portable and plug in or plug through chime, both chime units can be placed in a different places within the operating distance to maximise the volume and range. The Push requires 1 x 23A battery (included). DB312: 1 x Portable Chime, 1 x Plug In Chime & 1 x Wireless Push.DB313: 1 x Portable Chime, 1 x Plug Through Chime & 1 x Wireless Push. The Byron Smartware DB313 Wireless Plug-Through Door Chime has a 30 metre operating distance. It provides a single melody, ding dong chime, and operates using a fixed code. Its plug-through feature means that there is no loss of socket. Another mains powered object can to be powered by plugging into the chime's socket. It also comes with a portable chime, that can be placed in a different room to the plug in chime. It has a 80-85dB rating, depending on the sound. Compatible with all Byron DB ranges. The plug in chime is mains powered.The push requires 1 x 23A battery (included).The portable chime requires 3 x AA batteries (NOT included).
