Sennheiser Model Name: MOMENTUM 4 Wireless This is a Rakuten limited color. Purchased on 2024/3/13, I'm selling it because I haven't used it much at all. (According to the seller, they stopped the aging process because they weren't satisfied with the high-frequency adjustments and the vocal clarity. After about 10 hours of aging, they adjusted the sound balance and felt that the overall sound had a spacious, live-venue-like quality. They were also told they had good ears by someone who works as a record engineer for Touhou matches, who said they understood sound well. They are confident in their hearing. They also own the standard Momentum 4 in black and, knowing the quality of the product, bought this color because they liked it, but found they didn't use it because it was the same. They loved the color and cherished it, but due to unexpected expenses, they are reluctantly selling it. It has been disinfected, but please understand that it is a used item before purchasing. Although it's almost new, please understand that it is a used item and only purchase if you are satisfied. m(__)m Search words: Sennheiser momentum4 Rakuten limited color Amazon limited color Limited quantity Denim color Blue Metallic blue