The item The Soundcore R50i NC True Wireless Earphones with Mic and Noise Cancellation Bluetooth Earpiece (A3959) Soundcore R50i NC Bluetooth Earbuds That Are Actually Wireless 42dB Noise Reduction with Adaptive ANC 42dB ANC depth is used to cut down on background noise. To deliver the best noise reduction experience, adaptive ANC continuously monitors ambient noise. For optimal noise reduction in various environments, use a multi-mode ANC. Clear vocals and a powerful bass are achieved with 10mm drivers and the unique BassUp TM technology. Cell phone holder hidden: The case has a hidden cell phone holder that makes it easier to watch movies and browse the Internet. Al-Powered Calls: improved calls with four microphones and a unique Al algorithm. Ten hours on a single charge: Ten hours of listening to music,