It has a bass throb knob, what more do you need? It's a Deja Vibe with real light sensors and a bulb and a standard vibe/chorus switch, a standard vintage/modern switch, and ( I never get tired of saying this!) A THROB KNOB!!! Plus it has a wave shape knob and a very handy wet/dry knob, so a bit more versatile than the DejaVibe. The THROB KNOB (!) keeps you from losing your low end which makes it great for bass. The wet/dry knob gives more or less dry signal in the mix for more or less note clarity, a bonus! Calling is the best otherwise you may wait for a long time for a response