Sig Kilo 6HD and Kestrel

[skxf430]

A total noob question.

I have the Sig Kilo6k's and they only provide a built in range for Applied Ballistics to 800 yards. I understand by connecting a Kestrel 5700/X to the Sig's, they will provide further range upwards of 2,000+ yards. When connected, is the Kestrel providing all the Ballstics and wind info from 800 yards and up? Or, is it providing that info at any range. And, is it that much more accurate than the built in Applied Ballistics?

Thanks for any insite.