Concerning this item Mobile-Friendly Design: Soundcore A30i prioritizes comfort and style with its stylish lipstick-shaped case that is all about making a statement. These tiny, light earbuds feel almost weightless and are ergonomically designed for the best fit. Robust and intelligent noise cancellation: Soundcore A30i noise-canceling earphones reduce background noise by up to 46 dB. The A30i uses adaptive algorithms to identify outside noise and intelligently auto-adjusts to the ideal level of noise cancellation for you. With the help of composite diaphragms, the Soundcore A30i produces clear, well-balanced sound with a 3D surround sound effect. For a more engaging audio experience, open the Soundcore app and turn on the 3D surround sound effect. AI-Enhanced Clear Calls: With four microphones integrated, enjoy clear calls wherever you go.