Louroe Audio Monitoring TLI-VPSC is a speaker/microphone consisting of an 8 inch speaker and electret condenser microphone and includes model VPSC housing. Microphone produces line level output (0 db at 600 ohms) with an omni-directional audio pattern. Speaker is 8 ohm with a 70V transformer. As part of a Louroe audio monitoring system, model TLI provides two-way communication between the remote area and the Louroe audio basestation. The VPSC housing is a baffle and grill for surface mounting TLI to a ceiling or wall. VPSC is 18 gauge cold roll steel, silver/grey finish and is designed for industrial applications.