It's very convenient because you don't need to connect an adapter (you can still use it normally even if you connect an adapter). There's no noise at all. I was keeping it as a spare, but I'm selling it because I haven't had a chance to use it. Everything in the pictures is included. It can be fully charged, and each port works without any issues. I think it's in relatively good condition, but please understand that it is a used item. There are few rechargeable power supplies, and this product has already been discontinued, so if you were looking for one, please consider this opportunity.