SoundCore A30i ANC Wireless Bluetooth Earphones with 46dB Noise Reduction and Adaptive ANC 46dB 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. Strong bass and incredibly clear sound: 6mm custom driver, compact, powerful. Powerful bass and clear sound are achieved with exclusive BassUpTM Technology. Easy to carry and comfortable to wear: Its small size and light weight make it incredibly comfortable to wear. For the best portability, use a small lipstick case. Al-Powered Calls: Improved calls with four microphones and a unique Al algorithm. High-level dustproof and water-resistant for use is the IP54 SweatguardTM Water-Resistance. One charge lasts up to seven hours: Seven hours of music playback, twenty-four