Wide Application and Universal Fixed Base: The strap of the base has elasticity and adjustable length, suitable for 22.2-28.6mm handlebars, including bicycle, motorcycle, shopping driver, baby driver, etc. As long as the buckle is fastened, it won't fall regardless of the undulating terrain and vehicle bumps, which is very stable Detachable Design: The phone silicone band is independent of the fixed base. Convenient to use the mobile phone while riding. Made of tough and stretchy silicone bands, the phone holder can be flexibly stretched to fit all 4.7-7.2 inch phones Adjustable Rotation: The bike phone mount back is designed to rotate. The phone can be placed horizontally or vertically, at a fixed angle that suits you, making it easy to navigate, read a map, answer the phone, etc. Full Protection of Your Phone: Plastic material, so that it has wear resistance. There is a non-slip line on the inner side of the buckle, which is particularly stable after installation and will not fall out Suitable for Phone: The bike phone holder base is compatible with the phone. You can put the phone on it so that you can achieve timing, counting mileage Specification: Material: ABS+nylon plus fiber Applicable: 4.7-7.2 inch mobile phone universal Purpose: riding bicycle phone bracket