This is a unit based on the Tortuga LDR 3. The difference is that the parts have been upgraded. The RCA's are gold, the capacitors are upgrades, and the wire is silver teflon coated. The display indicates which of the three inputs are selected.
This unit was built by an Electrical Engineer. And he built it to be the finest that it could be. He has designed many preamps. But, this is the best passive that I have heard. It comes with remote for volume and input selection.