Bose QuietControl 30 wireless earphones. This is a used item, so please understand that it is non-refundable. Returns are not accepted. Please assess the condition based on the photos. The same applies to the accessories. Operation has been confirmed. The following is a product description. Retail price: 35,200 yen ■ External dimensions: 165(W) x 152(H) x 19(D)mm ■ Weight: 65 g ■ Color: Black ■ Battery charging time: 3 hours ■ Continuous battery playback time: 10 hours ● Freely adjust the noise cancellation level This groundbreaking new technology enables a listening style like never before. You can freely control the surrounding noise. Block out surrounding noise on a noisy train. During waiting time at the airport, control the noise so you don't miss boarding announcements while making calls. Block out the noise again after takeoff. By controlling the noise in this way, you won't be bothered by noise throughout the day. ● Ergonomic neckband design The lightweight neckband fits around the neck, providing a superior fit. Also, it is made of soft-touch material, so you can enjoy music comfortably even for long periods of use. ● Active noise cancellation Noise is always around us. Noise can be canceled by generating a signal with the opposite phase of the same waveform as the noise. Microphones are placed inside and outside the headphones to continuously measure and compare this noise. Furthermore, the StayHear+ QC tips, which fit gently in the ear, function as passive noise cancellation. ● Uncompromising wireless sound There are no cords, but of course, there is no compromise in performance even wirelessly. Optimized EQ provides balanced and uniform sound at any volume. Even if you turn up the volume in a busy city, you can enjoy music with faithfully reproduced sound. The introduction of Bluetooth and NFC pairing makes wireless connection to devices quick and easy. Also, using the remote control, you can answer/end calls, play/pause songs, adjust the volume, and other operations without touching the connected device. You can immerse yourself in music to your heart's content.