100 Hours of Non-stop Listening: 233621 Hush wireless headphone plays up to 100 hours of music at standard mode, and delivers up to 70 hours of battery life at noise cancelling mode. Thanks for the incredibly long last battery, travel light without a charger & cable is possible now. Industry-Leading Noise Cancellation: This nice Bluetooth headphone features dual noise-detecting microphones to pick up and cut out up to 96% of external noise so you can focus on what you're listening to. The transparency mode lets outside sound in and allows things to sound and feel natural nearby. CVC noise reduction technology blocks out the wind noise and improves call clarity in noise situations.