Rearview Mirror Phone Holder for Car, Rotatable and Retractable Car Phone Holder, Multifunctional Phone Holder Universal 360 Degree Rotatable Rear View Mirror Phone Mount for All Mobile Phones This is a rear-view mirror phone holder, which needs to be hung on the rear-view mirror. Please measure the size and thickness of the rear-view mirror before purchasing. It is suitable for rear-view mirrors with a thickness of 2.4~3.5 inches and a width of 1.2-2.3 inches. 1.97 inches of space is required on the back of the mirror for installation.