The WF-SP800N truly wireless sports headphones combine long battery life, resistance to water and sweat and deep bass sound with digital noise cancelling. So, when the going gets tough, they won't let you down. With an IP55 rating, splashes, sweat and dust won't stop these water-resistant headphones or your workout. You can even rinse them after a tough training session. At full charge, the headphones offer up to 9 hours of power, while the handy charging case provides an extra 9 hours. That's up to 18 hours of noise-free listening. With noise-cancelling switched off, it's even longer 13 hours of power on a full charge, with an extra 13 hours provided by the charging case, for up to 26 hours of play time. if you're in a hurry, 10 minutes' quick charging gives you up to 60 minutes of music playback with noise cancelling. A Bluetooth chip, which transmits sound to left and right ears simultaneously, coupled with optimized antenna design ensures a stable connection and outstanding listening. Low audio latency makes for enjoyable viewing too. The compact charging case not only protects your WF-SP800N, it also lets you power up on the go. Holding a single further full charge, the case lets you enjoy up to 18 hours of music playback with noise cancelling switched on and up to 26 hours without. Quick charging is also available. When you need that special playlist to take your workout to the next level, noise cancelling blocks out distractions, like the sounds of the gym or the street, so it's just you and the beat. The WF-SP800N delivers clearer voice quality for hands-free calling and you can take calls using either, or both, of the earbuds. This allows you to alternate their recharging or hear calls more clearly in noisy environments.