SUWA Model CA-Set charger. I used this to charge mini 4WD batteries. This listing includes the main unit and USB cable only. There is no instruction manual, but you can find information by searching for "SUWA Model CA-Set". There are three dials, and you can set each one to the desired voltage and start charging. It will charge to the specified voltage. You can switch between the three dials using the selector next to them, so I used it by setting three different voltages. I tested the operation before listing, and it is currently working without any problems. This is a used item. While there may be individual differences in perception, I have rated it as having no noticeable scratches or stains. There may be some scratches or marks from the time of purchase. Please refrain from purchasing if you are looking for a perfect item or are overly concerned about minor details. No returns or refunds accepted. Thank you for your consideration.