These units are drop in
replacements for any current product. The exterior dimensions and connector
types and pin-outs are identical. They are marked clearly as V3 units. They do
require a new antenna for Multi GNSS capabilities, but can use pre-existing
RaceGrade GPS antennas if they are not subscribed to Multi GNSS.
The basics are that the
performance without the paid-for Multi-GNSS option will nearly identical to the
V2.1 device with a few software perks.
With Multi-GNSS enabled
the unit uses GPS, GLONASS and BeiDou;