Not so impressed with Tesoro after today. Sent my old Cutlass in after it quit working. Got a call today that the cannot verify I am the original owner as my registration card is not on file. This machine was my first detector purchased in the mid-80's (most likely pre-computer). Guess what I don't have the receipt any longer. Asked the Customer Service person to check my other machines serial numbers (2) Compadre's, Cibola, Toltec 100 none of them showed up as registered. All registration cards were filled out and sent in at time of purchase, none on file. She told me she has worked there only two months and has had more than 75 people have issues with registration cards. Had to give her credit card # and will be billed $50.00 to have tech check detector and return shipment, all repairs will be additional and at full cost. My advice is to contact Tesoro and make sure your registration is on file, or have your credit card handy if your detector needs repair. The warranty is for the first, original owner and you better be able to prove it! I'll keep you posted on the outcome.