USB 3.0 Tether Repeater Cable Tethered Photography Tools for Nikon D850 D800 D800E D810 Phase One IQ140 IQ160 IQ180 IQ250 IQ260 IQ280 Canon 5DS 7D Mark II 16ft Long, USB 3.0 (2.0 compatible) This extension/repeater cable contains active electronics The repeater gets its power from the USB 5VDC bus, so no external power adapter is required Multiple repeater cables can be daisy-chained together to get even longer USB cable runs Works great with the Nikon D800, D800E, D810, Canon 5DS & 7D Mark II and Phase One backs