GoPro 3D Hero System Features:
The GoPro 3D HERO System allows you to combine two GoPro HD HERO Cameras, or two GoPro HD HERO 2 Cameras into a single housing to record 3D video and photos while simultaneously recording in 2D. A synchronization cable plugs into the rear HERO Port on both cameras to join them together, enabling both cameras to record video and photos in perfect synchronization. This is a requirement for professional quality 3D and is available only from GoPro.
NOTE: HD HERO2 cameras require a firmware upgrade to be used with the 3D HERO System. Also, you cannot combine an HD HERO Original camera & HD HERO2 camera to make 3D video.