Bought this preamp a few months ago but decided to go back to stock on the bass I had it in. Super versatile, an affordable way to get active/passive switching. Knobs are volume (push/pull active/passive), balance, passive tone, treble, and bass. Preamp gain is easily adjustable. Pickup connection is solderless. I've currently got the battery terminal wires clipped for ease of installation, but can resolder and cover with heatshrink at your request. Includes box and all instructions. More info on the preamp here: SEB Series Preamps. Asking $60 $50 $45 shipped CONUS, PayPal only. Thanks!