Mount it on your bicycle or motorcycle's handlebar，For 25-30mm Handle Bar DiameterCheck time/map/callings/messages with ease.Waterproof，not 100% water-proof case.It only protects in slightly water-drop or rain.Install on bike， bicycle handlebarYour touch screen still work fine in the case. Package includes:1x Waterproof Case1x Mount Holder2x EVA foam pad