Fishman PRO-FCL-001 Full Circle Upright Bass Pickup - UNC 1/4-20 formatHear Every Nuance of Your Upright Bass Plug in the Full Circle and the sound of your upright is all there. Whether its big, fat and punchy pizz, full voiced arco or slap, youll hear all the acoustic qualities, dynamics, and nuances of your bass and so will your audience. Features Produces an accurate, transparent sound Fine tuning feature lets you quickly choose between an open, resonant response, or a more focused tone to match your instrument and