If I am correct, it'll only work with the 5700 Elite AB, I don't think it'll even work with the Kestrel 5700 Hornady 4DOF...
I'd give Vectronix a Call or ask Jason @ EuroOptic to hit them up for you..
FYI, that bluetooth connection to the Kestrel, while it's nice to have, it's super slow and will drain your battery.
You do have that PLRF25C BT x2 w/ Ketsrel Upgrade correct? Not the standard bluetooth?