?Package Contents & Worry-Free ?You can get 1 x Air Vent Clip, 18 months Worry-Free, 12-Hour response friendly customer service. ?Easy to Install? Unscrew the knob to release the hook and insert it onto the air vent to hook one of your vent blades firmly, then tighten the knob to lock the hook in place ( Note: the vent hook is retractable and rotatable). ?Broad Compatibility?ZeeHoo car mount air vent clips could be installed in most vent types,like round / horizontal / vertical vents ( NOT for rotary vents & make sure the hook is towards down when installed it in horizontal vents). ?Upgraded Anti-Fall Clip?3-Point support vent clip provides ultra-secure holding power, which keeps the clip on the vent boards more stable than any other Vent Clips. Easily go through all the road’s bumps and turns, never worried about dropping your phone while driving. ?Universal Vent Clip ? This car air vent clip could work well with the car mount or wireless car chargers whose joint ball diameter is 0.67inch (17mm), and it fits for all ZEEHOO wireless car charger mounts and other air vent mounts in the market ( Please make sure the ball size is matched ).