Electronic Keyless Lock, Function Classroom with Key Override, Access Method Keypad, Mounting Style Mortise, Lock Material Zinc Alloy, Finish Satin Chrome, Series DL4500, Handle Type Lever, Door Thickness 1-3/8 in to 1-7/8 in, Key Override Options 1-3/8 in Mortise Cylinder, Hand Right, Power Source Battery, Battery Life 60,000 Cycles, Max. User Codes 2000, Standards UL Listed, Weather Yes, Electrical, Ligature No