[WIDE COMPATIBILITY] The Resolve's 3.5mm AUX jack ensures high-quality audio without any distortion. It's compatible with most 3.5mm-enabled devices such as smart phones, laptops, tablets, desktop computers, MP3 / MP4 players, and other portable music players. [CRYSTAL CLEAR CALLS] With a built-in, in-line microphone, the Resolve enables you to make crystal clear calls at any time. Enjoy hands-free calling that's perfect for an on-the-go lifestyle. [IN-LINE CONTROLS] The multifunctional in-line controls allow you to play / pause your music, adjust the volume up / down, skip / replay tracks, answer / reject calls, and activate your voice assistant - all without touching your phone or device. [COMFORTABLE FIT] The Resolve's earhook goes around your ear while holding the earphones firmly over your external ears so that they stay as you move around. Since it doesn't go directly into the ear, it will not cause pressure or pain in your ear canals. [OPEN-EAR DESIGN] Resting lightly on the outside of your ears instead of inside them, the Resolve relieves ear fatigue and maximizes comfort. Listen privately to calls, music, podcasts, or videos, yet still hear your surroundings at the same time.