WH138-B5K 10K 20K 50K 100K 500K B1M Swched Potentiometer Adj

3.5mm headphone socket PJ-338-9P Horizontal 9-pin swched nav

Battery packs 1/2 3 4 5 6 7 8 10 AA five covered swched side

3-in-1 AC Power Socket DB-14-019 Brass Pins Fused Swched