JBL Pro Sound delivers surprisingly rich audio and punchy bass. Ultra-portable design with clip carabiner. IP67 Water and dustproof design. Wirelessly stream Bluetooth from an enabled device. Battery provides up to 10 hours of battery life. 40mm Transducer. Built-in 3.88Wh Lithium-ion polymer battery. Dimensions: 3.4"W x 5.3"H x 1.8"D. Includes Type-C USB cable.