Purchased in December 2019. Selling because I no longer use them. The case is engraved with "k.kohei". All accessories are included. The right earphone sometimes produces a "hissing" sound depending on the surrounding frequency, but it can be used without problems in quiet places. This is likely due to the initial defect described in the following URL. Please purchase with the understanding of the following: AirPods Pro Service Program for Sound Issues https://support.apple.com/ja-jp/airpods-pro-service-program-sound-issues Operation confirmed. Please purchase only if you understand that this is a used item, as returns are not accepted to prevent replacement with counterfeit goods. Popular model: AirPods 1st generation Connection type: Wireless Features: Bluetooth Features: Bluetooth, Noise Canceling