The AL1002ULADA is an NAC power extender housed in a red enclosure that connects to any 24 volt Fire Alarm Control Panel.The extender features a built-in charger for backup batteries of gel or sealed lead acid types. The unit automatically switches over to battery power if/when AC power fails. Also known as -Altronix AL1002ULADA Proprietary Power Supply - 110 V AC Input Voltage - Wall Mo-NAC PWR EXTENDER 24VDC 10A 2 CLASS A OR 4 CLASS B-Altronix Corp. 24VDC @ 10AMP 4OUT NAC PS - AX-AL1002ADA