inputs.text: good perfomance - like tinker electronics devises fun device old cassette player nice digital bar graph display output vertical cassette mechanism quit working long ago removed cassette mechanism installed black filler insert cassette mechanism originally case 5 x 6 piece 18 plywood black vinyl covering carefully measured cut hole accept mp3 player mounted slotbe aware device not come instructions however pin outs clearly marked circuit board two two wire sockets right left outputs one power socket one 3 wire aux socketto make life simple order jst sh jumper 2 wire assembly 8 2 wire sockets going use aux input need jst sh jumper 3 wire assembly 8 also consider ordering least one spare aware probable cost mp3 self good soldiering iron steady hand might able attach small gauge wire socket prongsyou need power supply unit used old 5 volt ac dc power supply modem died also need whatever type input output connectors use connect external amp powered speakers etctip tried wiring two outputs independently two rca jacks old cassette recorder connected outputs external amp unit would try play drop tif card reader search leaving fm aux search however one output connected would work fine disconnected one negative wires one outputs one common back mp board everything worked finethis mp3 device currently show unavailable amazon bought onebay comes china took almost month arrivegood luck