Page 2
10mm ( 1/ 2 inch). Do not fix the bell to the wall yet. Battery Operation. Transformer input- 220 - 240v Transformer output- 8v 1 amp input- 220 - 240v Byron model: 7770 output- 8v 1 amp is recommended Byron model: 7770 is recommended 1. For exsisting installed 1. For new installed transformer...