JerkStopper for Digital Director Removes the stress and strain from your USB and power cable Mounts to back of Manfrotto Digital Director JerkStopper cable retention device provides an anchor point allowing slack in the cord preventing stress, dislodging, and damage Use the JerkStopper with both the A/C power cord and USB cable simultaneously The two included aluminum lock nuts allows the JerkStopper to be rotated and secured in any direction for easy customization