1.-Bike Speaker Mount: speaker mount for most Bluetooth wireless speakers, designed for riding, golfing and boating. Quickly attach your bluetooth speaker to rails such as golf carts, boats, bicycles, motorcycles, etc. To take your speaker when you are out and about 2.-This JBL speaker mount has two straps that expose the controls and provide more adjustable positions for your speaker to make it easier to secure your speaker more ly sideways. 3.-Fastens securely: two long straps fit portable speakers with a circumference of 4.94 to 14.21 inches. The two short straps for attaching the mount to a railing fit railings/bar with a circumference of 3 to 11 inches. The surface is covered with numerous non-slip particles to hold the speaker securely in place without fear of it moving or falling on tough terrain. 4.-Widely used: portable holder can serve as a speaker holder or bottle holder on bicycles, golf carts, boats. Perfect for hiking, boating, exercising, sunbathing, and most cylindrical speakers such as JBL Charge 4/Charge 5, JBL Flip 5/Flip 6, UE Boom 3, Bushnell Wingman View Golf, Sony SRS-XB23, Doss SoundBox Pro, etc. Fits most cylindrical and rectangular speakers and water bottles