This is the TOPPING NX3 portable amplifier. I bought it because I heard the sound quality was good, but I ended up not using it because I rarely use headphones outside. Since I've hardly used it, it's generally in good condition, and I believe all the original box and accessories are included. I charged it and tested it, and it seems to be working fine. I searched to check the used market price, and found some unusually high prices (40,000 yen, etc.), so I'm not sure what the going rate is. I've set a price for now. Thank you.