The Steinberg USB eLicencer Key is a USB copy protection device (often referred to as a "dongle") which is needed to use Steinberg's software range.
You only need one Steinberg Key to run all of the Steinberg software you own - provided it is all run on the same computer system.
The USB-eLicenser is actually a tiny computer which stores licenses for Steinberg products, and is connected to a USB port on your computer.
The USB Key is not included in the following software:
The Grand 3
RND Portico 5033 EQ
RND Portico 5043 Compressor
RND Portico 5033/ 5043 Bundle