4 melodies;Radio range: 60 metres;Automatic machine learning;Maximum 2 wireless buttons;Fixed volume;Portable doorbell power supply: 3 AA batteries (not included);Additional portable chime unit for use with the Byron BY range;Self learning with BY bell pushes;Choose from 4 melodies;60m operating range;Requires 3 x AA batteries (not included)

• Byron Extra Wirefree Portable Door Bell Chime Unit for BY Range BY1
• White

Byron Extra Wirefree Portable Door Bell Chime Unit for BY Range BY1Smartwares Safety & Lighting