BM WORKS Slim3 i6 Smartphone Bike Mount for iPhone 6 - Secure Bicycle Phone Case Holder with Clear Touch Screen Window, Easy Access for power button, volume, and Plug Hole for earplugs/battery charger Smartphone Bike Mount designed for iPhone 6 with clear touch screen window Plug Hole for earphones/battery charger at the bottom only Simple and Secure mounting system with Dual Safety Lock mechanism that protects your phone from falling while riding Easy to install without any tools, Installable on Normal size-25.4mm bar/stems and up to Oversize-31.8mm bar/stems Product is not waterproof since it offers Plug Hole. However, the material is waterproof