(M) Package outside size: 165*100*30mm Package size: 150*85*25mm Applicable models: S7edge/S8/S9/iPhone6.7.8 PLUS/iPhoneX/XS and other models within 5.8 inches (L) Package outside size: 185*110*30mm Package size: 168*92*25mm Applicable models: S8+/S9+/note series/iPhoneXR/iPhoneX MAX and other models within 6.5 inches Note: Because it is related to the screen-to-body ratio of the mobile phone, it needs to be based on the actual size Installation instructions 1. Both the waterproof bag and the bicycle base can be removed. 2. When configuring the bicycle base, buckle the base card position into the buckle groove on the back of the waterproof bag to fasten it (it takes a little bit of effort, and it is fastened when you hear a "click" sound). 3. Unzip the zipper, put the phone in the waterproof bag (depending on whether it needs a gasket), and then close the zipper.