S6 3D Stereo Bluetooth Speaker Waterproof Outdoor Wireless Subwoofer Handsfree Support AUX TF Card 4000mAh Battery|bluetooth speaker waterproof|speaker waterproofbluetooth speaker MAIN FEATURES: 1). Built in dual 45MM high definiton dynamic speaker drive units, delivers 3D surround bass and stereo sound quality. 2). Waterproof, Shockproof, Auti-dust specially designed for outdoor use, the edge made of aluminum, very durable to use. 3). adopt the bluetooth 4.0 chipset stable signal transmission, powerful audio decoding, operating distance up to 10 meters, Superior Compatibility, works with all the bluetooth enabled electronic devices including smartphone, notebook, MP3, etc. ( please note if you use to smart tv or desktop, it may need a bluetooth adapter to use ) 4). built in 4000mAh Super big capacity lithium battery, extremely long standby and using time, the talk time / playback time up to 15 hours. 5). multi-functional design, not only a speaker, but the speaker built-in 4000mAh battery and USB Port can be used as a Powerbank to charge the electronic devices. 6). built-in Micro-SD Card Slot, Support TF Card Play Mode (32GB TF Card Max), Insert A TF Card With Downloaded Songs To Play Music like an MP3 Player, support songs format of MP3 / WMA. 7). Support AUX Line-out Music Play Mode, USe the Standard 3.5mm Audio Cable Connect The Speaker To Mobile Phone Or Tablet PC To Play Music even when your devices without bluetooth function, can be used as a wired speaker. 8). built-in sensitive HD microphone, handsfree support to answer incoming phone calls even when it play music or when you're driving.