V12RDE on September 27, 2015 A V-Series 1RU 12-Rotary Extension key panel is used to increase the number of Talk/Listen paths for a user. It has 12 talk pushbuttons and 12 rotary listen switches. Each talk pushbutton has an associated audio level rotary switch control and can be configured for Talk and Listen. It connects to the host panel over CAT5 up to 7m (25'). Up to 8 Extension panels can be connected to the host panel. Extension panel keys should match the host panel (rotary with rotary).This product is also available as Pushbutton and Lever extension key-panel types.