I check the operation of items before listing them and only list products that have no issues. For charging cases only, I confirm that they power on. Regarding shipping, I strive for fast shipping. I primarily list used items, so I check them at the time of listing, but there may be oversight regarding scratches, stains, or damage. Therefore, I ask that those who are overly concerned refrain from purchasing. Please understand that when purchasing only one earbud or only the earphones, pairing may not be possible due to compatibility issues with the case. In such cases, I recommend initial setup. There may be omissions or errors in the descriptions, so please confirm with the photos when purchasing. The color may not be discernible in the photos due to lighting conditions; please confirm in the comments if necessary. If there is a problem with the product after arrival, please contact me before leaving a rating. Returns and claims after rating are not accepted. Shipping is basically via Yu-Packet Post Mini. Items that cannot be posted will be shipped separately.