Designed to be worn by residents or staff and enables calls to be generated remotely from the Call Point. This is ideal outside or in lounges or common rooms where each resident can be given a Trigger to allow access to the Call System. The Intercall TRF4 requires an infra red or radio enabled Call Point to operate. When using the TRF4 with an integral 700 system, it is possible to identify the call location and the individual caller.