OK Model Tamazo Onboard LiPo Meter S. I bought this on impulse when I owned a lot of gliders. It is a used item. I tested it once to make sure it worked. I don't think there are any noticeable scratches or stains, but it has been stored at home for a long time, so please purchase it only if you understand that it will be delivered in its current condition. If you are concerned about this, please understand the contents before purchasing. Please feel free to ask any questions before purchasing. Thank you very much.