This item is a junk item. There is noise, possibly due to a malfunction in the microphone on the right (R) side, specifically a "whooshing" noise when using noise cancellation or external sound capture. When these features are turned off in the app, the noise disappears, and music can be played normally. The left (L) side does not have this noise, and noise cancellation and external sound capture work correctly. Therefore, please consider using the item with these features turned OFF, or for parts. Due to the above reasons, this item is considered junk. No warranty is provided, so please consider this before purchasing. The exterior condition shows signs of wear and tear. Only the ear tips are included. The items I sell may include used items, so I cannot answer inquiries regarding usage period or frequency. Please understand. Shipping is included, and the item is priced low, so please refrain from price negotiations. Immediate purchase is welcome!