The V-Series 1RU 12 lever extension key panel is used to increase number of talk/listen paths for user. It has 12 Talk/Listen lever keys and each key has associated up/down audio level control buttons. It connects to the host panel over CAT5 up to 7m (25ft). Up to 8 Extension panels can be connected to the host panel. Extension panel keys should match the host panel (lever with lever). This product is also available as Pushbutton and Rotary extension key-panel types. International 10-character alpha-numeric fonts such as Cyrillic, Hanigul, Kanji and Katakana.