Sanwa Supply Smartphone Holder with Screw Adjustable Bicycle/Cart Clamp, Angle, Portrait/Landscape Compatible, CR-LASMP1

This is a smartphone holder that can be attached to the handle of a cart or bicycle handlebars. You can adjust the width of the holder to fit your smartphone. You can easily remove your smartphone with one hand. Simply turn the lock lever to securely fasten your smartphone. The holder is about the size of the bottom half of a smartphone, so it can be installed without blocking the camera.