Operation not confirmed. This is a junk item! As shown in the photos, it's generally cloudy and dull. It's difficult to see! There are rust spots, stains, scratches, and dullness in various places! The center of the back side is slightly dented and warped. This is an old item, so please understand that there is damage. Please check the photos carefully! Please purchase this item with the understanding that the overall condition is not good.