The EMG AB220 after burner is identical to that of right from, but has the pot two detents (locking catch points), and, at 8dB at 15 dB ( 20 dB with fully Aufgedrehtem pot). The AB220 works with active and passive EMG pickup. In the box: 1 from 220 boost control 1 Battery Clip with Buss connector 1 Stereo Output Jack (battery switching) 2 Interconnect Cables.