I have no way of testing it... What you see in the pictures is what you get.. Please pay close attention to all of the pictures. Any flaws in the item will be shown and make sure the part listed is the one you need.NOTE TO ALL OUR VALUED CUSTOMERS. Thank you very much for your business. Pleasure doing business with you..... Good luck on any of your future Porsche endeavors.. The item "Mercedes Vintage BECKER Grand Prix Am/Fm Car Radio" is in sale since Sunday, February 26, 2017. This item is in the category "eBay Motors\Parts & Accessories\Vintage Car & Truck Parts\Radio & Speaker Systems". The seller is "dporschepartsman" and is located in Laguna Niguel, California. This item can be shipped worldwide.