These units are drop in replacements for the V2. 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;

• Tracks up to 12 US GPS satellites
• Tracks up to 12  GLONASS satellites
• Tracks up to 22  BieDou satellites
• Tracks up to 3 SBAS correction satellites in parallel
  • Galileo and QZSS capable with firmware update
• All variants deliver high-precision, differential positioning accuracy of 60 cm, 95% of the time
  • 67% of the time precision will be 30cm
  • Consumer off the shelf GPS is typically no less than 2.5M
• COAST and SureTrack routines maintain sub-meter DGNSS positioning for 40 minutes after SBAS correction loss