CRDCsmart Bluetooth Speakers, Wireless Speaker 2600mAh Rechargeable Battery 8 Hours Playing Dual 5W Stereo 2 Channel Drive 4.0, Waterproof IP65 Speaker for Outdoor Sport MP3/4 Music Phone Call ADVANCED DUAL 2*5W SPEAKER : Implemented With 2*5W loudspeaker in the little device which can produce a loud, clear and high qualify sounds.Perfect for travel, bicycle/Bike, cycling, climbing, camping, hiking, running, fishing etc outdoor sports use. WATERPROOF,SHOCKPROOF,DUSTPROOF : Durable Shell - Soft protective case. Rated IP65 for resistance against dust and water, meaning the Speaker can withstand pressurized jets and waves of water. Soft protective case avoid scratching and anti-shockproof(test passed within 1 meter),Can be used under harsh environment. AUTOMATICAL RECONNECTION & EASY PAIR : Comes with an amazing bluetooth quality that is easy and simple, and always pairs after the first pairing! It will automatically connect to the last connected smart device when you open ,You don't ever have re-pair them again. Up to 33 feet connect range without losing quality or transmission of your music! . Built in high sensitivity MIC, 3.5mm Audio in Jack mode for computer or other non-bluetooth devices. LONG BATTERY LIFE & AUTOMATIC SHUT-DOWN : Built-in rechargeable 2600mAh lithium battery , For up to 11 hours of playtime at medium volume, up to 8 hours playing time at the maximum volume. and if you not connect with our speaker ,it will Automatic shut-down in 20 Minutes ,So you don't worry your speaker always in the boot state when you not use it, Perfect for an all day outing. And Have battery residual quantity indicator function. UNIVERSAL COMPATIBILITY : Our portable speakers can be paired with all types of devices that use Bluetooth technology! Use the water-resistant Bluetooth speaker to stream music from an iPhone or Android smartphone, an iPad or Android tablet, an iPod Touch or even a computer or laptop with Bluetooth.