Byron 7770 Transformer is a hard wired bell transformer in white with a power rating of 8 Watt 1 Amp....
Price: £10.95 from Tooled Up
Byron 771 Wired Door Chime is a hard wired wall mounted door chime with electro mechanical ding dong. Powered either via a separate transformer or via a 9V battery NOT included....
The Byron BY30 is an additional bell push that will only work with BY range of door bells. Self learning. Weight 70g...
Byron 761 Door Chime Budget Kit is a hard wired wall mounted door chime kit with 8 melodies. Includes bell push, door chime, cable and clips. Requires a 9V battery NOT INCLUDED....