The Ozark Trail Waterproof Floating Speaker Backpack is a portable speaker system that is both durable and versatile. This oval-shaped speaker is designed to be waterproof and can be charged either by solar power or USB. It is compatible with both Apple and Android devices and features Bluetooth connectivity for seamless audio input. The bright yellow color and plastic material make it easy to spot and use in various outdoor settings. With Bluetooth version 5.0, this speaker provides high-quality sound and a convenient way to enjoy music on-the-go.