FAQ

By fully extending the cable and releasing it to return to its original position (clip at movies)

Extend the cable to its full length and check that it is not double up. Allow the system to roll up the cable. If not immediately successful, repeat as needed (clip at movies)

This is very easy to adjust. Extend the cable to its full length and move the rolling mechanism to the correct length (clip at movies)

Since a static magnet is used, it has no influence whatsoever.