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