Product picture - Meridian Technologies DigiCool FR-IS-RCU-2ST 1-Channel Bi-Directional Audio Receiver for Aiphone IS Series CCU & RCU Door Station Meridian, Technologies, DigiCool, FR-IS-RCU-2ST, 1-Channel, Bi-Directional, Audio, Receiver, Aiphone, IS, Series, CCU, &, RCU, Door, Station Click the image to close this page