The 920D Custom S5W-BL-V Wiring Harness features a 250K master volume, a 250K master tone and a 250K "no-load" blender pot. The blender pot allows you to blend in the bridge pickup, when the 5-way selector switch is on the neck position and allows you to blend in the neck pickup when on the bridge position. This harness gives you the standard 5-way pickup selections and additionally the bridge/neck combination, as well as the bridge/middle/neck combination.