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 head Lightweight foldable & adjustable design, easy and convenient for carry and storage., High-quality Bluetooth high-speed connection anwsering incoming call hands-free call Super compatibility Hi-fi stereo surround sound 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.