eLicenser

The USB-eLicenser is a copy protection device which is required by certain Steinberg products, including versions of Cubase, Nuendo and WaveLab released before 2022. Where it is needed, the USB-eLicenser must be purchased separately, unless you already own one. Please check individual product pages to confirm if a product needs the USB-eLicenser. If it does, please check for the "USB-eLicenser required" note after you have selected your product for purchase.

...