See video on Amazon.com First: disappointment We must also say that I had mishandled the clamp => My GPS Module floated carmine I had, in haste, outwit another accessory to stall the GPS In fact, taking up the head device rested: it is Amazingly Simple! Just like the perfect fit between the jaws of the clamp. Indeed, given the price: a great little accessory! Which has the advantage of avoiding, in some Garmin devices, the small square / small plastic plate hosting the ball of the base sucker! (A little painful to clip) This time it is the drag and here Note that despite my fears proved to be the cup of efficiency quite convincing. Very good article highly recommended.