MONCA, A unique air vent mobile phone ring holder, is made with high-quality zinc alloy. Zinc alloy is very much more durable than other plastic phone stands.It has extensive phone compatibility that you may use. It is compatible with all cell phone brands and devices, even with a case.This cell phone air vent ring can rotate 360° and flip 180°. It can also support horizontal and vertical and can be easily locked in one position for your hands to be free after you attach this to your cell phone. You can clip this air vent cell phone holder to your car air condition units for safety while driving.