The Acefast T6 headphones make listening to music even more fun. They have 4 microphones with ENC noise cancellation, so the quality of your calls is perfect. The headphones offer up to 4 hours of battery life and the built-in digital display keeps you informed about the battery charge level. Bluetooth 5.0 is responsible for a reliable connection. You'll have no trouble operating the headphones, and the touch panels give you convenient control - helping you to efficiently answer a call or change a song without having to reach for your phone. Listen to up to 20 hours of music Listen to your favourite songs with almost no limits. The headphones offer up to 4 hours of uninterrupted music or up to 3 hours of phone calls (70% volume). With the charging case, you can extend this time up to 20 hours.