The SDRv3 is universal for anything between 30mhz to ~1.7Ghz.
The Bias tee is enabled via software, so it’s off at default.
Because the LNA is a seperate part, you don’t have to put it on the cable / between SDR and Antenna.
You can get one HERE, Outernet is switching to their own SDR/LNA combounit named SDRx in the Moment.
I am using the SDRv3 since autumn of 2016 to receive wheather sats in the 2m band and so on.
I realy like SDRs from RTL-SDR.com and have almost every Version of them xD