Electronic Keyless Lock Function Entry with Key Override Access Method Touch Screen Keypad Mounting Style Cylindrical Lock Material Metal Finish Satin Chrome Series NTB600 Handle Type Lever Door Thickness 1-3/4 in Key Override Options Sargent Interchangeable Cylinders Hand Nonhanded Network Interface None Outside Height 8 1/8 in Outside Width 3 3/4 in Outside Depth 3 5/16 in Keypad Material Hardened Plastic Power Source (4) AA Batteries Battery Life 20 000 Cycles