Remote - Playing and Controlling Devices : About Remote

About Remote
MIDI from control surfaces (keyboards, remote control units etc.) is handled by a protocol called Remote. The Remote protocol allows for seamless integration between Reason Essentials and control surface devices. It is basically a mapping system that provides direct hands-on control of parameters for each Reason Essentials device - including transport and sequencer track selection!
At the time of this writing, Reason Essentials supports a large number of control surfaces and keyboards - the knobs, faders and buttons on the devices are automatically mapped to parameters on each Reason Essentials device.
Remote drivers for more control surfaces will be added continuously. Check the Propellerhead web page in case your model isn’t listed on the Preferences - Control Surfaces tab.
Remote controlling Reason Essentials devices couldn’t be made any simpler. Set up your control surface once and for all for use with Reason Essentials - the program handles the rest!

Remote - Playing and Controlling Devices : About Remote