Main Unit Audio Video Input Output Tuner PN: Bn41-01274a >>> OUR GUARANTEE: All the Electronic and Spare Parts sold are Covered by a 90-Day Warranty. In the unlikely event of a Functional problem, we provide a full and Complete refund or an exchange of the item. If you are satisfied with your transaction, please leave your comments; If not, please contact us at (734) 728-TECH. Thank You and Happy Transaction !!!