The Libec ZC-LP LANC Zoom Control enables remote REC start/stop and zoom control for LANC-equipped Sony and Canon cameras, and it supports select Panasonic cameras. The zoom control clamps onto your tripod handle or any rod with a diameter from .39 to 1.77". It features a 2.3' long cable with a 2.5mm sub-mini plug for connecting and controlling your camera. In addition to the start/stop record button, the control unit comes with an invert switch that changes the direction of the zoom's response to the rocker. The zoom control also features a switch that allows you to change the protocol from LANC to Panasonic.