GOPRO Handlebar Seatpost Pole Mount - Black GPS Accessories and the anti-scratch protection function

and the anti-scratch protection function is the best in the market

Treble and Volume Controls

or you can just make notes directly on PDF files

Bluetooth connection with any Bluetooth speaker

GOPRO Handlebar Seatpost Pole Mount - Black GPS Accessories and the anti-scratch protection functionNow compatible with the mounting buckle,GoPro'sHandlebar Seatpost Pole Mountlets you quickly attach your camera to small tubes ranging from 0" in diameter. Two rubber inserts are included ensuring a secure fit and minimizing vibrations from bumpy trails or other impacts. Once the camera is clipped to the mount, it can rotate 360 for precise framing. Sixteen position detents hold the camera steady, regardless of orientation. Fits 0. 35 1. 4" Diameter