The Sony WF-SP800N truly wireless sports headphones combine long battery life, resistance to water and sweat, and deep bass sound with digital noise cancelling. The compact charging case not only protects the 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. At full charge, the headphones offer 9 hours of power, while the handy charging case provides an extra 9 hours. That is up to 18 hours of noise-free listening. With noise-cancelling switched off, it is even longer