Powers up to four 232-ATSC 4 tuners or four QMOD HDTV modulators. When ordering tuners or modulators in groups of 3-4 units, the PS12-8-4Y may be requested in lieu of the PS12 -1.5 and PS12-2 power supplies for no additional fees. 12VDC 8A supply with 4-way power splitter, 110/220V, 50/60Hz, 2-pin power plug.