Features:
SK-F01E is a portable USB follow focus that can improve HD camera function. 
A universal USB connector can connect USB follow focus with camera， and then you can achieve diversified functions by rotating middle knob to adjust sharpness or other respective functional keys. 
You can all control the multifarious function of the camera completely in any place， and take complex pictures and effect easily.
Easy to dismantle and mount.
It is compatible with Canon EOS Digital SLR camera， including:
EOS 5D MARK III
EOS 5D MARK II
EOS 1D MARK IV
EOS 7D 
EOS 60D
EOS 6D
EOS 600D/Rebel T3i/Kiss X5
EOS 550D/Rebel T2i/Kiss X4
EOS 500D/Rebel T1i/Kiss X3.

Specifications:
Material: ABS
Power: 2 * AA batteries(not included)
Package size: 12 * 10 * 10cm / 4.7 * 3.9 * 3.9in
Package weight: 254g / 8.94oz

Package List:
1 * USB Follow Focus Controller
1 * 1m Mini USB Cable
1 * Outer Mental Box 
1 * Manual(Chinese & English)(other accessories not included)