Note : If the size of the earbud tips does not match the size of your ear canals or the headset is not worn properly in your ears, you may not obtain the correct sound qualities or call performance. Change the earbud tips to ones that fit more snugly in your ear.Specific uses for product : Gym, Personal, iPhone, Android, Sports, Gaming, School, Travel, Workouts Skullcandy Supreme Sound - Relax, workout or skate listening to your favorite tunes. The Indy Evo ensures supreme sound through awesome bass, powerful treble, high highs and much more. stability ear gels the Indy Evo is designed to stay Hours of Power - The Indy Evo holds a total of 30 hours charge, the case holds 24 hours and the buds hold 6 as well either bud can take calls or activate your assistant. Use rapid charge and get 2 hours of play from only 10 minutes charge Never lost with Tile - With Tile tech, Skullcandy makes it super easy to track down either earbud and keep your gadgets safe! Download the Tile app and follow the instructions to activate Leave your phone in your pocket - you spend too much time on it anyway, control your music, answer calls, activate an assistant, switch EQ modes and more from the Indy Evo.Note:If you face issue in Bluetooth connectivity please turn off the Bluetooth function for a couple of minutes, then turn it back on