The Beats Studio Wireless 2.0 model includes a serial number on the slider above the right earpiece that can be viewed when the headphones are expanded. The pair of headphones I purchased did not have a serial number anywhere on the actual product. Additionally, the headphones and the charger were each in a plastic bag, unlike authentic Beats. Further, the packaging inside the box was damaged. The cardboard packing materials were bent and the interior of the box was stained.