Boombotix Handlebar Mount Kit 2.0, Designed for Optimal Sound and Speed - Gray SLEEK FRAME: provides a low profile and compact mounting feature to attach Boombot to bike handles DUAL LOCKING MECHANISM: a seamless pinch-release system secures Boombot onto bike handles OPTIMAL SOUND AT HIGH SPEEDS: handlebar mount is built to provide high quality sound even at high speeds DURABLE: constructed from rugged ABS plastic with drainage holes in order to maintain stability even on the most difficult biking terrains COMPATIBLE: with Boombot1, Boombot2, and Boombot REX on handle bars that are sized between 25.4mm and 31.8mm