This gravity reaction car phone holder With a gravity linkage design, the elbow air vent phone holder's arms can form a stable triangle structure when you place the phone on. Hold your phone securely even on a bumpy road., The clip and the back are equipped with a soft silicone pad, which will not cause any scratches on the phone. Clamp it when you put it down and loosen it when you want to take it out. The gravity is automatic., Tool-free installation ​of this Vent Phone Holder Gravity Reaction. Simply clip it to the car air vent, then put down your smartphone in the car phone holder's bracket, The car phone holder cradle will auto lock by gravity securely., This car phone air vent holder's silicone pad will hold the car air vent securely and won’t damage or scratch the air vent. If you have any questions, Please contact me.,