Ultra-High Performance Noise Cancelling Certified by SGS, a World-Leading Certification Body With the incorporation of high-sensitivity sensors, large-diameter drivers, and a chamber that enhances sound insulation, the fundamental performance has been significantly improved. Now, a wider variety of everyday noises can be effectively cancelled out. New Technology: Ultra Noise Cancelling 3.0 Not only does the earphone detect and eliminate external environments and noise, but it also instantly measures the shape of your ear, removing even the noise that was previously missed. It provides personalized noise cancelling for each individual. Up to 50 Hours of Ultra-Long Playback The earphones alone provide up to 10 hours of playback, and with the charging case, you can enjoy up to 50 hours of music playback.