Bose sound sport-free headphones are completely wireless, so you can enjoy total freedom of movement with nothing not even a single cord in your way. The acoustic package is designed to deliver sound so clear and powerful. Worried your earbuds will fall out during your workout? don't be. Stay hear, sport tips are built to stay comfortably in place, even when you're training hard. And if you can't find an earbud, all hope is not lost. You can track down lost earbuds using the Bose connect app's “find my buds” feature. It shows when and where the earbuds were last connected to your phone. Still, having trouble finding your earbuds? don't worry, an audio signal from the headphones can alert you to their location. Don't sweat your sweat (or the weather) either, because water-repellent materials Inside the earbuds help keep moisture out. Off a single charge, the earbuds play for up to five hours, and the fully charged case gives you an additional 10 hours of music. Play or pause tracks and access your phone's Siri or your Google assistant right from the earbud. You can even take phone calls, through the right earbud only.KEY FEATURESEarbuds are sweat and weather resistant (with an Ipx4 rating) and come with 3 different pairs of Stay hear and Sport tips (in sizes S/M/L) that provide a comfortable and secure fitUp to 5 hours of playtime with each charge and an additional 10 hours with the included charging case also features a charging time of 2 hoursTrack lost earbuds with the Bose connect App's "find My buds" featureFirmware update to improve Audio video synchronization for customers using iPhones, iPads, and other Bluetooth devices that support AVDTP version 1.3 or later, available via connect app. Connectivity Technology: Wireless Bluetooth