These are fully wireless earphones from final, offering high-quality sound and noise-canceling features. They have a small, lightweight design that fits snugly in the ear, making them suitable for use while lying down ("sleeping headphones"). I used them for only two days indoors, in a pet-free and smoke-free environment. I haven't taken them outside or dropped them, and I've taken good care of them, so there are no scratches, and I think they are in good condition. I only fully charged them when I put them back in the box, so the battery is almost not used (I didn't fully charge them on purpose). The replacement ear tips and charging cable are unused, and the box and all accessories are included. 【Product Features】 Brand: final Color: Black Reference Price: ¥5,980 ■ Ultra-small design, 4g per side Adopts the ultra-small housing of the ag brand "COTSUBU series," which has sold over 500,000 units. This is the smallest and lightest noise-canceling earphone in our lineup, approximately 20% smaller in volume compared to the ZE3000 SV, making it less likely to protrude from small ears and ideal for sleeping headphones. The internal mechanism has also been revamped to upgrade the fundamental aspects of sound quality and comfort. ■ "Noise-canceling" that balances sound quality and sound insulation In addition to high sound insulation performance due to its ultra-small size, it features "noise-canceling," which is unusual for this size. It also includes an "Ambient Mode" that makes it easier to hear surrounding sounds, allowing you to switch modes freely while wearing them, such as when you want to hear announcements on a train. ■ "Airflow port" that disperses pressure Equipped with an "airflow port" that disperses pressure even when the earphones are pressed from the outside. By adjusting the pressure in the ear canal, it reduces the burden on the eardrum and also reduces the burden on the internal drivers. It achieves durability that makes it difficult to break even when used while lying down, making it ideal for sleeping headphones. ■ New feature "Touch operation disable function" Tapping five times in a row activates the "touch operation disable function," disabling subsequent touch operations. This prevents accidental operation if you accidentally touch the earphones, and also turns off the announcement sound and LED lights, making it useful when using them while sleeping. I have carefully cleaned them with a non-alcoholic disinfectant and have already put them back in the box. I will ship them within 24 hours via anonymous delivery.