iStone WS2 Portable Wearable Wireless Bluetooth Speaker, Watch Speaker, NFC TechHands-free Call, Micro SD Card Input, Changeable Rubber Strap, Aluminum Knob - Black &#9836;Convenient Watch Design:This speaker is small and light enough to take .There is no any burden when you run with speaker on the arm .Comfortable smooth watchband, make your running or bicycle ,dancing, Enjoy shocked music all the way! &#9836;Simple, stable pairing all your digital media from any Bluetooth device or NFC and control iStone WS2 from across the room. If you do not want to connect a Bluetooth or NFC, iStone WS2 also has a 3.5mm stereo AUX input port, and SD card input port. &#9836;With its compact size ( Only 1 lb, Just 2.6 inches long) , iStone WS2 is the perfect companion for any mobile device.No confusing buttons, easily to switch music playing mode to phone calls mode,everything is Simple as the speaker itself. &#9836;Implemented with 3W total acoustic drivers and ultra-small size produce a wide audio spectrum. The newly designed passive radiator could provide strong bass without distortion even at highest volume. Turn it on and immerse yourself in 3D sound. &#9836;With a built-in rechargeable battery that last up to 6 hours, you can party all day or nightanywhere. Owning iStone WS2, holding a relaxed and happy mood.