The UNIQU lighting kit phone clamp extends as wide as 3.15 inches. It can accommodate all new generation phones since they are all under 3.15 inches. You can use it with your phone case.At the 90 degrees configuration, big phones like iPhone 12/13 Pro Max, Samsung S21 Ultra as examples will be fully supported. UNIQU lighting kit can support up to 400-500 grams in the overhead configuration.