Please note: The longest side of the product is 13 inches. Compatible with all JBL speakers except JBL Xtreme/JBL Boombox/JBL Xtreme 2/JBL PartyBox/JBL Xtreme Special Edition^ Make your life more convenient: Portable speaker stand for golf carts-fully focus on the fun of golfing, enjoy music anytime, anywhere.^ Intimate non-slip design: scratch-resistant, tight-fitting speaker straps, so that the installation and speakers are firmly fixed on the railing. Don't worry about items falling on the ground, no one is more considerate than us.^ Adjustable shoulder strap: Suitable for portable speakers with a maximum circumference of 13 inches. You can also hang some accessories, such as drinks, towels, sunglasses and golf caps.^ Easy to use: Easily connect wireless speakers to the railings of golf carts/beach umbrellas/boats. Suitable for any railing with a circumference of no more than 4 inches.