Adaptive Noise Cancellation (ANC): The Soundcore R50i NC's cutting-edge ANC technology can cut background noise by up to 42dB, guaranteeing a comfortable listening experience even in noisy settings. Whether you're at home, at work, or on the go, the multi-mode ANC adjusts to your environment to provide the best possible noise reduction. Superior Sound: The 10mm drivers in the earbuds produce rich, detailed sound with strong bass and clear treble. Hip-hop and electronic dance music, which feature a lot of bass, are perfect for these earbuds because of Anker's unique BassUpTM technology, which amplifies low frequencies. Extended Battery Life: With the charging case adding an extra 35 hours of power, you can enjoy up to 10 hours of continuous playback on a single charge, for a total of 45 hours of battery life. Sweat Guard IP54