Anker Soundcore Liberty 4 NC (Bluetooth 5.3) True Wireless Earbuds with Ultra Noise Cancelling 3.0 Technology, Wireless Charging, Multi-Point

Ultra Noise Cancelling 3.0: The earphones not only detect and eliminate external noise, but also instantly measure the shape of your ears to eliminate even noise that previously missed, providing personalized noise cancellation. Further upgraded basic performance: The earphones' basic performance has been enhanced with a high-sensitivity sensor, large-diameter drivers, and a chamber with enhanced sound insulation, effectively canceling out a wider range of noise. Long-lasting 50-hour playback: A fully charged earphone provides 10 hours of playback, and with the included charging case, you can enjoy 50 hours of music playback. A 10-minute charge provides approximately 4 hours of playback. Perfect for everyday use: Multi-point connection allows simultaneous connection to two devices (such as a smartphone or PC), six microphones and AI-powered calls, and IPX4 waterproofing, making them ideal for a variety of situations, including online meetings, studying, and exercise. Package contents: Main unit, charging case, ear tips (4 types), USB-C & USB-A cable, safety manual, quick start guide, product certified with the Technical Approval Standard (frequency band: 2.40-2.48GHz)