The ATH-SPORT7TW true wireless in-ear headphones will help keep you motivated and moving during your workouts—with absolutely no wires to get in your way! The headphones come with four interchangeable sizes (XS, S, M, L) of ergonomic Freebit® ear fins to give you a custom – and comfortable – fit designed to stay in place during physical activity. The headphones also have a certified IPX5* waterproof rating, so you can wash the sweat off them and have them ready for your next workout. The ATH-SPORT7TW in-ear headphones are equipped with powerful 5.8 mm drivers to deliver outstanding sound reproduction. There’s a mic and touch sensor built into the earpiece, allowing you to answer calls, control music playback, and adjust the volume on your smartphone or other device. You can also access the Audio-Technica Connect app on their smartphone to quickly and easily adjust headphone settings. For additional safety when using outdoors, particularly in areas with heavy traffic, the headphones include a switchable hear-through function that lets you to hear ambient noise. The headphones provide 3.5 hours of continuous use on a full charge, and can be recharged up to 4 times using the included portable power bank charging case for a total of 17.5 hours of use. The charging case even features a quick charge function, which gives you 45 minutes of playback from a 10-minute charge. In addition to the ear fins, the headphones come with four sizes of interchangeable eartips (XS, S, M, L), one pair of Comply™ foam eartips (M) with SweatGuard™ technology, and a 30 cm (1.0') USB charging cable for the charging case.