I'm not sure what you are reading but the PDF I linked to is from Motorola Solutions - DVRS.
You are correct that it can be simplex, half or full duplex. I provided the specs on the VRS-EP that is readily available to hams, the VRS 750 that is still available for business or ham use, and the DVRS.
The question asked was what the Repeater switch on the charger was for. It activates the white wire on the VRS/DVRS and enables repeat mode.
Futurecom does not appear anywhere in the text of the Motorola PDF. It does say, "Sold exclusively through Motorola Solutions" so you may very well be correct in who manufactures it.