With the soundcore Liberty 4 NC White, you barely hear anything of your surroundings. Adaptive active noise canceling scans ambient noise and adjusts the anti-noise to it. This way, you can even enjoy your favorite music in peace in a busy office. The earbuds have a 10-hour battery life and the charging case has a 50-hour battery life. This means you can enjoy your favorite music for up to 60 hours before you have to charge the earbuds. Are they earbuds empty? You can charge them for 4 hours of use in only 10 minutes. The earbuds support Hi-Res audio files. These files are larger and ensure a more detailed sound reproduction. This allows you to be fully immersed in your favorite music.