The Samsung SHS-7020 Digital Door Lock; Stylish Black Touch Keypad; Door Access controlled by PIN codes and/or RF Card/Key Fob (250 capacity); Random Security Coding; Passage Mode; Automatic Locking Mode; Zinc / Tempered Glass; Non-Handed; Powered by 1.5V x 5 AA Alkaline Batteries; 9V Terminal; Mechnical Override Key; UL-Listed Cylindrical Tubular Latch with 2-3/4" Standard Backset; Outdoor & Indoor use. Four prox cards are included. See Data Sheet.