Tether Tools TetherBoost Pro USB-C Core Controller (Select Variant)TetherBoost Pro USB C Core Controller Extension Cable Give Your Image Transfer a Boost During a photoshoot having the ability to move around freely while shooting tethered is critical to your success. The TetherBoost Pro USB C Core Controller Extension Cable extends and enhances the Type C signal an additional 16 ft with a maximum length of 31 ft. This extension cable helps move your images up to 10Gbit s for a fast and secure way to transfer files