This is a table tennis machine from CALFLEX. I purchased it new and used it for about 3 months, once a week (2 hours) each time. It can change the spin from topspin to backspin, so it was useful for stepping up from beginner level. *There is no instruction manual, but I will include a simple instruction guide that explains how to use it. Assembly and operation are simple and easy. No tools or batteries are required. Due to the way the balls are pushed out, not all balls will be dispensed. About 10 balls will remain in the machine, but this is not a malfunction. Simply refill the balls to resume play. There is a small tear at the top of the net that holds the balls, but it does not affect normal use. Please understand that there may be signs of use and minor scratches. Please understand that this is a used item, and we ask that you refrain from price negotiations or returns. Shipping will generally be on weekends, so please consider this when making your purchase if you have a specific usage schedule.