Securitron AQD3-8F8R AccuPower 3A/1.5A at 12VDC/24VDC Power Supply, with battery charger/backup and supervision, a dual voltage switching power supply with a fire transfer relay that uses any AC power source from 90-240VAC/43-63Hz to provide up to 3 Amps at 12VDC or 1.5 Amps at 24VDC total output. This unit provides clean, steady, accurate output for best performance of access control equipment. It is field selectable dual voltage 3A/1.5A at 12/24VDC. This compact module is for smaller footprints. This universal transformer is compatible with most international power. It works in AC brownout down to 60 VAC. Faster battery recharging under full load. The automatic low-battery disconnect prevents deep discharge, maintains battery life. The self resetting circuit breakers help for common conditions including: Over current, thermal runaway, reverse battery hookup. The class 2 power provides limited output. The Eight (8) channel power distribution with access control and fire transfer relays o channels individually configurable to enable/disable with fire trigger o heavy duty relay per output wit status LED, or group outputs by jumper o can provide dry contacts, normally open/ normally closed selected via jumper o individual input for each output o power-limited, fuse protected outputs., each with a green status LED indicator o main power LED indicates input power status o trigger LED indicates fire relay status o pluggable terminal blocks by channel and function. The fuse protects against surges for AC input and DC output. The SPDT Form C outputs for remote monitoring of: AC failure, or low battery. It's made in the united states, and it is UL listed.