A PTO grain vac often needs its speed changed as the job changes, and it may be parked well away from where the work is. PowerSync lets you adjust the tractor's engine speed and stop the PTO from a handheld remote.
You need to keep the machine and the area around it in view, and nobody should be near the driveline when the PTO starts. Do not rely on a remote that is off or out of range to keep the PTO from running: it is not a lockout device. Never go into a bin with the PTO able to run. Before any service or clearing a plug, shut off the engine, remove the key, and disconnect the controller.
Range is up to about 300 ft in the open. Bin walls and buildings reduce it, so check it at your own site. If contact is lost for 10 seconds, the PTO shuts off.
Fit depends on the throttle sensor and PTO switch on your John Deere. See every model by series.