Optiline Belt, bracket for smartphone holders & cases for the handlebar. Features Suitable for mounting on handlebars with diameter from 15 to 40 mm Fully adjustable, allows the use & display of the phone both vertically & horizontally Compatible with all Optiline Duo-Lock accessories, sold separately Optiline Duo Lock System Patented modular interchangeable Duo Lock system Universal or specific cases, resistant, rainproof & with input for charging cable Wide range of mounts & combinations for your vehicle One of the advantages of this line is the modular system, which allows the use of the same case on multiple motorcycles, just by buying an additional mount & not the whole set. Also, in case of another phone, you can simply buy another case without changing all the mounts.