WATERPROOF RATING IPX7: Shock-resistant, IPX7 Waterproof, Dustproof and Shockproof Easily withstands extreme conditions and tough treatment. Perfect for outdoor sports. BLUETOOTH 4.2 TECHNOLOGY: Compatible with all Bluetooth-enabled devices. Instantly connect to your smartphone or tablet from up to 33 feet away. LONG BATTERY LIFE: Built-in high capacity battery,directly to the computer's USB port charging Up to 24 hours lasting at middle volume (depended on the size and source of music). ULTRA PORTABLE: Portable design and high quality material. Contains a climbing buckle that you can fasten it anywhere and take the music on the go. EASY USE: TVs and non-Bluetooth devices use the included 3.5mm audio cable connected to the AUX-IN jack --- BUILT-IN MIC for handsfree speakerphone from Smartphones and iPhones.