Byron IB series audio door intercoms, a sturdy Metal outdoor unit which has a  surface mounting bracket and a lighted push button with name plate. Adjustable bell volume. Cable extends to Max. 30m. 2-way communication. Button for door lock function (door-lock part number BYRDB5005 or BYRDB5005L). 3year Guarantee. 

Got stuck with the installation? Give the Byron helpline a call and they will talk you through it. The number is on all our packaging.