There are just some protoytpes of this charger yet. Handmann planned them for bi-supercharging modern downsized otto- and diesel engines, but single supercharging for minor engines also is possible.
I'm glad to have had the opportunity to interview one of Handmann's r&d engineers while the IAA in Frankfurt, Germany. More to come on my website soon but you'll have to translate on your own or via babelfish. Questions here or via contact form on my website will be answered in English the best I can