The big squashy call button is air operated and is linked to the air sensor via a thin rubber air tube.
The button plugs into a small adaptor unit. This contains the air sensor and measures the change in air pressure on the pad. This adaptor unit then plugs straight into your call system.
The button comes complete with a fitting bracket that allows it to be screwed to a wall or table:
Alternatively, it can be mounted to a variety of surfaces using the supplied sticky pads.
View Touch Sensitive Button Instructions & Specification