The Opteka FFR-900 is a motorized follow focus and zoom control system bundled with a modified CXS-300 shoulder support rig designed to work with all DSLR cameras and most lenses up to 600mm. The focus and zoom can be controlled from either the receiver (mounted atop the shoulder rest), or from the remotes located on each hand grip. The FFR-900 is an all-in-one solution for all videographers looking to produce stabilized cinematic video without overextending their budget. Specifications Construction: Aluminum Weight Capacity: 30 lbs (13.6 kg) Compatible Rails: 15mm Power Source: LP-E6 Lithium-ion battery (included); AC/DC Charger Dimensions (LxHxD): 22 x 7.6 x 14.9" (55.8 x 19.3 x 37.8 cm) Weight: 4.25 lbs (1.92kg) What"s in the box ~ Shoulder support rig with shoulder pad, camera mount, handgrips & 15mm rods ~ Main focus and zoom controller ~ Remote focus and zoom control units (for handgrips) ~ Connection cables for controller ~ 15mm gear mounts ~ Zooming lens gear ~ Focusing lens gear ~ LP-E6 Lithium-ion battery for controller ~ LP-E6 AC/DC rapid battery charger ~ Instructions ~ 1 Year warranty