I purchased this item new on Aliexpress in August of this year. I liked the sound, but I haven't been listening to music as often, so I'm putting it up for sale. I bought it for listening, so I didn't use it regularly. After 20 hours of burn-in, I used it for less than 20 hours. I haven't found any problems. [Included Items] Complete set. Regarding the ear tips, I used ear tips other than the included ones for listening. The included ones have been lightly cleaned after testing. The outer box has a small dent in one area.