Long Battery Life: Up to 9 hours of battery life is available on a full charge and the included charging case battery can recharge them for an additional 9 hours. Simply place them inside the case and close the lid to start the recharging process. While inside, they are safe and protected from bumps and scratches.,Fast Recharge: In a hurry? Pop the earbuds into the charging case for just 10 minutes to give them up to 1 hour of music playback.,Tri-Hold Fit: Staying secured inside your ears is paramount, which is why Sony incorporates an ergonomic tri-hold structure. This design makes contact with three different points on your ear to maximize stability and comfort.,Hands-Free Calls and Voice Commands: When pairing the WF-XB700 headphones with your smartphone, you can utilize the built-in microphones to conduct calls hands-free. You can also speak voice commands to your phone’s built-in digital assistant. Get directions, send a text, control your music, and much more.