PREMIUM SOUND: These Sol Republic Amp Air earbuds deliver a rich and full sound that bring you straight to the source. These wireless buds fit independently into each ear so you'll have no restrictions. FEATURES: These rain and sweat resistant (Ipx4) headphones are great for better workouts and longer product life. They have a multi-function button that allows you to easily access microphone and music controls. AUTHENTIC DESIGN: The two separate earpieces fit snugly and comfortably into each ear. They come in a sleek portable and compact charging case that can fit easily in your purse or bag. It is the perfect size for traveling. RECHARGEABLE & COMPATIBLE: The charging case has a built in 2200mAh battery that allows you to charge the buds up to 15 times, and use it as a backup charger for your phone or other devices. The extended battery life allows for three hours of audio time. SOL REPUBLIC: Sol Republic are music lovers who are committed to changing the world one listener at a time. They are Saviors of Sound ready to rid the world of hollow sounding headphones and speakers..BATTERY LIFE : Amps Air 2.0 provides up to 3 hours of playtime per charge