Sound Buds Sport The Comfort-Fit Earbuds with Smart-Magnet Control Advanced Audio Technology Connect via Bluetooth 4.1 & instantly enjoy crystal-clear, finely balanced stereo sound up to 33-feet from your device. CVC 6.0 noise cancellation technology reduces background noise & microphone echo. Apt X HD gives lossless, CD-quality sound (for apt X-compatible devices). Smart-Magnet Control Automatically connect to your last device or pair with a new one by separating the earbuds. Control your music & phone calls (on the built-in mic) in the same way. Comfortable to Wear A complete range of eartip & earhook sizes are included for a perfect fit. Comes with two sets of eartips: noise-isolating & semi-open which let you hear outside sounds. The Neckband design keeps wires out of the way & tangle-free. Long Battery Life Sound Buds have an impressive 8-hour playtime on a 1.5-hour charge, allowing you to enjoy music on-the-go all week. They interface seamlessly with i OS to display remaining battery life (playtime varies according to volume level & audio content).