Product Name: Bluetooth Earphones Canal Type ATH-ANC400BT [Wireless (Neckband) / Canal Type / Noise Canceling Compatible / Bluetooth Compatible] Model Number: ATHANC400BT Purchased about 3 years ago. Original price: 24,860 yen. Selling due to replacement. Accessories are unused, as shown in the photos. The left side sometimes has a scratchy sound, but it doesn't interfere with use. Please refrain from purchasing if you are sensitive to this. ■ Up to approximately 20 hours of wireless + noise-canceling playback ■ Supports a wide range of high-quality codecs such as aptX HD, aptX, and AAC, which excel in reproducing the original sound ■ Supports USB Type-C wired connection, enabling high-quality listening without playback delay on smartphones, etc. ■ Supports φ3.5mm stereo mini-jack wired connection, enabling Hi-Res audio playback* *Hi-Res quality playback is only available when connected via φ3.5mm wired connection ■ Equipped with a specially designed φ12mm driver that allows you to listen to high-resolution sound with a two-layer diaphragm ■ Quick Hear-Through function allows you to quickly check the surrounding sounds ■ Compatible with the smartphone app "Connect," allowing you to adjust the noise-canceling effect