Features Completely wireless, so you’ll enjoy complete freedom of movement. Sweat and weather-resistant earbuds with an IPX4 rating. Up to 5 hours per charge. Charging case provides up to 10 hours of additional playtime. Designed to maximize the strength and reliability of a wireless signal. StayHear®+ Sport tips on each lightweight earbud stay comfortably and securely in place all workout long. Volume-optimized EQ and Bose® digital signal processing make music sound full and balanced at any volume. Track lost earbuds, easily manage Bluetooth® connections and access future updates with the Bose® Connect app. Take calls using the right earbud. An integrated dual-mic array lets callers hear you clearly, even in noisy environments. Play or pause tracks and access your phone’s Siri or your Google Assistant™ right from the earbud.