Ultra Noise Cancelling 3.0: Not only does the earphone detect and eliminate external noise, but it also instantly measures the shape of your ear to eliminate noise that was previously missed. Provides personalized noise cancellation. Further Upgraded Basic Performance: Basic performance has been enhanced by the incorporation of a high-sensitivity sensor, large-diameter driver, and a chamber with improved sound insulation. This allows for more effective cancellation of a wider variety of noises. Up to 50 Hours of Long Playback: The earphones themselves provide up to 10 hours of playback on a full charge, and when used with the included charging case, you can enjoy up to 50 hours of music playback. Also, a 10-minute charge provides approximately 4 hours of music playback. Functionality Perfect for Everyday Use: Supports various features such as multi-point connection that can connect to two devices such as smartphones and PCs simultaneously, clear calls with 6 microphones and AI, and IPX4 waterproof rating, allowing you to use them in various situations such as online meetings, studying, and exercising. Package Contents: Main unit, charging case, ear tips (5 types), USB-C & USB-A cable, safety manual, quick start guide, product certified with technical standards mark (frequency band: 2.40-2.48GHz) Y102