These INTELLIGNET NOTIFICATION POWER EXPANDERS are 10 amps with six Class B or three Class A power outputs. Each output is regulated and power limited with a 3 amp maximum rating. They operate on either 120 VAC or 220 VAC and have a regulated 24 VDC output and synchronize strobes from AMESCO, Gentex, Cooper/Wheelock, and System Sensor. UL listed. FM approved.