It allows you to get a great position on your head. Compatible with all smart mobile phones, high quality supports TF memory card. These headphones offers you a sleek style with a slim profile but also an adjustable contoured headband., The headphones are extra comfortable so that your ears don�t hurt after wearing them for a long time. This foldable portable design makes it easy to take along on that next vacation or business trip or to store in your desk drawer for use at work., (providing simple 3.5mm wired connection to various devices), phone communication, music and phone controls are easy to use ?Support TF card and FM radio, Built-in Battery: With high performance rechargeable polymer battery, this headphone e provides 8-10 hours of music time, less than 1 hours of charging time FUNCTIONAL! Durable Earphone With mic Tangle Free cables and Call Receive / Cut and Play / Pause Button (Change Track on Double and Triple Click) makes it easier to have long lasting, tangle and frustration free music and call experience.