These wireless sport headphones feature advanced Bluetooth 4.1 technology with multi-point connectivity, allowing you to connect two mobile devices simultaneously. The high-sensitive built-in microphone with CVC 6.0 noise cancellation technology delivers crystal clear stereo sound with impressive audio quality up to 32.8 feet away. The secure auricle ear hook design includes three sizes of comfortable ear tips that fit snugly in your ear canal, providing a stable fit and additional passive noise reduction during activity. The rechargeable 80mAh battery provides up to 4.5 hours of continuous music playback or talk time with only 2 hours of charging time via the included USB cable. The in-line remote button enables hands-free calling and easy control of music playback. The sweat-proof construction makes these headphones ideal for running, jogging, hiking, yoga, gym workouts, and travel. This product includes a convenient carry case for storage and transport. The package contains the wireless headphones, three pairs of ear tips in small, medium, and large sizes, a USB charging cable, and a carry case. This product contains chemicals known to the State of California to cause cancer or reproductive harm under Proposition 65.