This is a used Texas Instruments TI-Graph Link For Windows. It has not been tested but if you have any problems please contact me with in 30 days and I will gladly refund you once the item has been returned.  What you see in the photos is what you will be receiving. Should you have any questions or would like more photos please let me know. There are scratches, and scuffs so, please review the photos for any wear and tear. Thank you!