You are looking at a remote zoom & focus controller that will work on most Canon camcorders with a LANC connection. This control unit can also turn the camera on & off, controls zoom speed and provides a record button as well. Cable supports two connector styles. We used it with a Canon XF 305 and it worked great. It is in perfect, unblemished condition.
http://www.ebay.com/itm/301083862292?ssPageName=STRK:MESELX:IT&_trksid=p3984.m1555.l2649
http://www.ebay.com/itm/301083862292?ssPageName=STRK:MESELX:IT&_trksid=p3984.m1555.l2649