I no longer use this. If anyone is interested, please take it. Yupiteru Swing Trainer ATLAS GST-3G Measures the distance of each club, ball speed, hit rate, and head speed. I bought it new and used it. It's clean with no scratches, but I've lost the instruction manual. You can download the PDF from the Yupiteru website. I just replaced the battery, so it should be usable for a while. This is a used item. Please understand and consider before purchasing. I apologize, but I cannot ship on weekends. Thank you.