This Push is only compatible with the Byron 'DBY' Extra Loud range of chime units, Models DBY 23562BS Plugin & DBY- 23561BS portable. It has a weather proof rating of IP44. It has a light that illuminates when pressed to show it has been activated. 

This additional push has a maximum range of 100 meters and can be linked your current DBY 23562BS Plugin & DBY- 23561BS portable chime units. 

• The size of this push is 34mm width and 84mm height
• Comes with backing plate and sticky pad for install