Thank you for viewing. The earbuds have been replaced with new genuine ZeniPower Z52H batteries. All functions have been confirmed to be working. You should be able to use them comfortably as issues such as failure to fully charge and rapid battery drain have been resolved, so please consider purchasing. There are no noticeable scratches or stains on either the earbuds or the case. Regarding the battery condition, the test results of continuous playback for 2 hours at 50% volume with noise canceling ON are posted, so please refer to them when purchasing. The battery condition of the charging case is also posted. The device has been initialized, so pairing should be smooth. The software version has been updated to the latest version, 4.2.1. The included ear tips and cable are unused. The ear tips attached to the earbuds have been used. They have been cleaned. Please understand that the earbud case is a used item. The product will be disinfected with alcohol and cleaned before shipping. Please see the product description here: https://www.sony.jp/headphone/products/LinkBuds_S/?srsltid=AfmBOopwvYJkcO64rWRk6fXTEh7FC5vnrGGBKaagegr54M_TE1XyyoE4 Sony Model Name...LinkBuds S Other Features...Noise Canceling