Louroe Audio Monitoring TLMC-WF speaker/microphone for providing bi-directional communication with a Louroe sound activated alarming base station (Model DG-12II/DG-25III and ALA-4TB/ALA-8TB). They each contain an 8 inch speaker, electret condenser microphone and a 1 inch call button. As a system, they can activate the Louroe base station by a sound that exceeds the threshold level set at the base station or by pressing the built-in call button. An LED on the face plate is illuminated when a call is acknowledged from the base station. Model TLMC-WF is for FLUSH mounting to a wall. Model TLMC-WS is for SURFACE mounting to a wall. Dimensions: TLMC-WF Face Plate: 6 1/2 inch W x 8 1/2 inch H. TLMC-WS Face Plate: 6 inch W x 8 inch H. Back Box for both units: 6 inch W x 8 inch H x 4 inch D