One-Key On/Off, Stronge Magnetic Quick Release TELESIN magnetic neck holder plus version ( Length at full extension 26 inches/66 cm approx) is equipped with a one-key on/off button on the back for easy and quick wearing. Meanwhile, it uses the innovative strong magnetic quick release technology, which can be locked in one step (directly insert to lock) and released in one step (by turning the magnetic adapter clockwise), so say goodbye to the cumbersome mounting and dismounting process.