Universal Phone Ring Holder Stand Works with Magnetic Air Vent/Dashboard?Car Phone Holder 360 Degree Rotation Kickstand Compatible with all Smartphones, Set up steps? Clean the device surface Wait till the surface dry Peel off the double-sided foam adhesive tape, then stick and press the phone ring holder on the phone back Check it to confirm it is firmly and completely attached. Please Note This phone ring holder is not suitable for heavy duty case, leather case, PU leather case, liquid silicone case and silicone case. Product size: 1 7/16" L x 1 2/5" W.