SmarTech&#8217;s newest addition: THE UNSTOPPABLE Bluetooth wrap around Headphones and mic Go nonstop in your sports activity with this invisible headphone that goes behind the head and enjoy nonstop music. Features:<ul><li>Fully adjustable volume; play features with built-in mic to answer your phone on the go.</li><li>Rechargeable play nonstop for 20 hours in one charge.</li><li>Charging cable with USB port included.</li><li>Compatible with all Smart Phones with Bluetooth or just about any device with Bluetooth enabled. &nbsp;</li></ul>