Thank you for viewing. No need to confirm beforehand, instant purchase is OK. First come, first served, so please refrain from price negotiations. This is a high-resolution amplifier that can be connected to a PC via USB to drive speakers and a subwoofer. I used it for about two years, but I am selling it because I switched to an amplifier-equipped speaker. It's compact and has sufficient functionality, and there are no problems at the moment. There is a slight scratch on the top corner, please check the photos. It comes with the box and will be wrapped in bubble wrap for shipping. Supports USB/AUX/Bluetooth connection - Brand: S.M.S.L - Model: A100 - Connection terminals: USB, AUX, Speaker, Subwoofer - Power supply: AC 100-240V Although it is a beautiful item, please consider purchasing only if you understand that it is a used item.