Tablet holder for bike handlebar or round tube with a diameter between 28mm to 35mm ( for use indoors, only )FeaturesPerfect accessory to use with LiveTraining Apps, The Sufferfest videos, or other media,Mounts to repair stand so you can easily reference the Internet when working on your bike,Spring-loaded clamp system is simple to use and securely holds your device in place,Holds from a 7.9 to 9.7 inch screen ( change to additional short arm when use 7.9 inch model ),360 degrees rotation system with knob sets the TPH-1 in the perfect position,SM clamp easily mounts or dismounts from the handlebar or tube.Compatible device sizeDevice diagonal size : 280 mm - 320 mm,( Using additional short arm : 215 mm - 280 mm ),Maximum capable thickness : 10 mm.SpecsInstallable size28 mm - 35 mm (tube diameter).Weight241 grams.Warranty1 year.