Electronic Keyless Lock, Function Entry with Key Override, Access Method Keypad, Mounting Style Cylindrical, Lock Material Aluminum, Zinc Cast, Finish Satin Chrome, Series 3090, Handle Type Lever, Door Thickness 1-3/4 in to 2-1/4 in, Key Override Options Mortise Cylinder, Hand Right, Outside Height 15 3/8 in, Outside Width 1 3/4 in, Outside Depth 2 in, Keypad Material Metal, Power Source (4) AA Batteries, Battery Life 40,000 Cycles, Operating Temp. Range -31 Degrees to 151 Degrees F