Ultimate call and voice quality: Hear and be heard. Conversations are made incredibly clear with X8 that are proven to deliver excellent call performance. The level of the output for our earbuds is to the recommended health standards. Much More Than a Case: On a single charge, the earbuds play for up to six hours long enough to power you through almost any workout. And when you're done, place them in the charging case to recharge. It'll keep them protected, and provides three additional full ch…