Nordstrand 3B-4b preamp custom. Layout is stacked volume/passive tone, blend, mid's with push/pull pot for 2 range of mid point, stacked bass/treble. Mini toggle is active/passive. Come with control knobs and new 9 volt battery clip and input jack. Was 163.50 new without the control knobs. Control knobs are the Sadowsky type. Price includes shipping and Paypal.