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 oversights regarding scratches, stains, or damage. Therefore, I ask that those who are overly sensitive refrain from purchasing. When purchasing only one earbud or only the earphones, please understand that pairing may not be possible due to compatibility issues with the case. In such cases, I recommend performing the 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 due to the lighting conditions during photography; 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 generally via Yu-Packet Post Mini. Items that cannot be posted will be shipped separately.