This waterproof, rugged blue Bluetooth speaker has so many features: It’s IP66 sand, mud, and waterproof; has a shockproof construction with rubberized cover; detachable carabiner clip; built-in microphone and hands-free speakerphone; floating design; and 60-foot wireless range. The built-in rechargeable battery has a 4-hour life. Measures 7.3” x 3” x 3.2”.