Anker Soundcore Liberty 4 NC (Blueooth 5.3) [Completely wireless earphonesUltra noise canceling 3.0Wireless chargingMulti-point connectionOutside

Ultra Noise Canceling 3.0: The earphones not only detect and eliminate external noise, but also instantly measure the shape of your ear 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 time playback for 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. Functionality ideal for everyday use: Compatible with various functions such as multi-point connection that can be connected to two devices such as smartphones and PCs at the same time, clear calls with 6 microphones and AI, and IPX4 waterproof standard, so it can be used in a variety of situations such as online meetings, studying, and exercising. Package contents: Main unit, charging case, ear tips (4 types), USB-C & USB-A cable, safety manual, quick start guide, technical compliance mark certified product (frequency band: 2.40-2.48GHz)