・Ultra-compact and lightweight body design 40% smaller body size than WFM4 Achieves comfortable wearability and improved wearing stability that reduces fatigue even when worn all the time ・High noise canceling performance Equipped with the same integrated processor V1 as the WF-1000M4 Achieves high noise canceling performance despite being small and lightweight ・High external sound intake performance Significantly increases the amount of intake compared to previous models.You can listen to music while listening without removing the earphones. ・High-quality call performance Achieves high call quality with high-precision voice pickup technology Achieves call quality that exceeds that of previous models ・Easy to use and individual optimization Automatic control function, high performance, drip-proof IPX4, 3D sound compatible Equipped with various usability features In addition to being noise-cancelling and high-resolution compatible, they are the world's smallest and lightest (*) design, and by reducing the amount that protrudes from your ears, the center of gravity of the earphones is close to your head, ensuring stable wearability. In addition, we have adopted an ``ergonomic surface design'' that increases the contact surface between the earphone itself and your ear. The shape makes it difficult to interfere with the complex unevenness of the ear, making it comfortable to wear even for long periods of time.