This is a HiTec X4 AC Plus 300. It's being sold because the cell balance is poor, which the seller is not happy with. According to the seller's father, the difference is about 10%. This has been the case since it was purchased, and it's unknown whether it's an initial product defect or a specification. The seller says it can still be used by someone who doesn't mind or for other functions due to its many features. This is being sold on behalf of the seller's father, so the seller doesn't know the details. Please purchase if you have the knowledge to resolve the issue. There are scratches and dirt due to it being a used item. Please refrain from purchasing if you are sensitive to such things. Please forgive the amateur packaging. Technical support for usage is not available. This is intended for those who think "as long as the product works." Please examine the photos carefully and purchase with no claims and no returns. Type...Radio Control