Is it fine if I use a CD slot phone holder

DVD player;iphone box;Apple charging block,HP ink,travel adapter phone holder cd slot Magic Mount CD is a new Magnetic mounting system for conveniently mounting your smartphone, tablet and more Just hover your device near the Magnetic phone case with polaroid slot Untoom CD Slot Mount Base for Car Mobile Phone Holder Universal 17mm Ball Joint CD Slot · Magnetic Phone Holder Car CD Slot Magsafe Mount Magnet Stand Cell

phone slot If you don't want to place the unit on your dash or windshield, iOttie also makes Magnetic 2 Air Vent Mount and Magnetic 2 CD Slot Mount