NEW! Huge 35db Boost range! Ultra quiet, Class A (single transistor) design. Tri-function booster/buffer, In bypass mode, it's an ultra high input impedance buffer (5Meg!). It's also a flat booster (<15db) in the lower gain range and a treble booster in upper rnage. Huge headroom, with 18V (2x9V batteries) internal power. You'll be cooking with gas with this one!