Keri Systems PWR.SUPP.W/O ENCLOSURE,12VDC, 2.5A,BATT.READY,ULTRA-CLEAN KPS-4-1 Power Supply - 12VDC @ 2.5A, battery ready, no enclosure, works with PXL-500, NXT and Mercury controllers. Supports 110 VAC to 240 VAC at 50 Hz and 60 Hz. Includes North American 60 Hz transformer.