• UL listed, conforms to UL 10B, 10C for use on fire doors • 600 Lb. holding force • Low power consumption • Instantaneous release • For all single, swinging and roll-up doors • Continuous duty operation • E-Z mount bracket reduces installation time • 12 and 24 Volt DC operation, jumper selectable • Available with built-in power supply & timer • Internal terminal block for field wiring • Door status monitor and LED status available