Desktop Main Speaker Unit with Gooseneck Microphone. Glass or Counter Mount Client Speakerphone. Hands-Free Operation. Volume Control and Signal Indicator for each Microphone. 1.6m Connection Lead. Supplied with 9Vdc Power AdaptorPower Supply: 9Vdc 300mA min (Adaptor Supplied) Lead Length: 1.6m (Hard-Wired to Speakerphone) Main Unit Dimensions: 158 x 87 x 46mm Speakerphone Dimensions: 91 x 77 x 23mm Weight: 347g (Main Unit) & 87g (Speakerphone). Intercom for conversation through a glass partition comprising a desktop speaker unit with gooseneck microphone and an extension speakerphone unit- which can be positioned horizontally or vertically in the client area. Independent level controls for the main unit and client speakerphone provide tailored adjustment to overcome the ambient noise level- with muting and anti-feedback circuitry to make two-way conversation clear and intelligible. an additional output is provided for recording both sides of the conversation. Applications include ticket booths- bank counters- petrol stations and receptions.. intercom-talk through system-2 way intercom