The Altronix AL600ULPD8 Power Supply-Charger converts a 115 VAC/60Hz input into eight (8) class 2-rated 12VDC or 24VDC power limited outputs. These outputs are filtered and electronically regulated. AL600ULPD8 Power Supply-Charger has short-circuit and thermal overload protection. AL600ULPD8 Power Supply-Charger automatically switches to stand-by battery when AC fails (zero voltage drop). It has got a gray enclosure. It is UL/CUL listed.