Anker Soundcore Liberty 4 NC wireless noise canceling sound to 50 hours of resolution waterproof technical standards Black (Blueooth 5.3) [Completely

Ultra Noise Canceling 3.0: The earphones not only detect and eliminate external noise, but also instantly measure the shape of your ears and eliminate noise that was previously missed. Provides personalized noise cancellation. Further upgraded basic performance: The basic performance is powered up by the installation of a high-sensitivity sensor, large-diameter driver, and a chamber with improved sound insulation. It is now possible to effectively cancel out a wider variety of noises. Long playback time of up to 50 hours: When the earphones are fully charged, you can play music for up to 10 hours, and when used with the included charging case, you can play music for up to 50 hours. You can also play music for about 4 hours with just 10 minutes of charging. Optimal functionality for everyday use: Compatible with various functions such as multi-point connection that allows you to connect to two devices such as smartphones and PCs at the same time, clear calls with 6 microphones and AI, and IPX4 waterproof standard, making it easy to conduct online meetings. It can be used in various situations such as studying, exercising, etc. Package contents: Main unit, charging case, ear tips (5 types), USB-C & USB-A cable, safety manual, quick start guide, technical compliance mark certified product (frequency band: 2.40-2.48GHz) /