The Aeotec Z-Stick is a self-powered Z-Wave USB dongle with push button for remote network creation (independent from external power and host microprocessor).
When attached to a host processor, it becomes a Z-Wave communication device, which exposes the Zensys API (SerialAPI) through integrated USB.
This device is meant primarily to allow a host processor to control up to 232 Z-Wave devices using the Z-Wave technology protocol all the while simplifying Z-Wave network installation.