The Digital Keypad is a specially designed digital keypad can be easily installed as a wireless or wired keypad. It can be programmed to use up to 25 different personal identification number (PIN) codes. Each code is face programmable with additional security features built in. Requires 3 AA batteries (not included). Wired installations require 16 gauge, low voltage, multi-stranded, dual conductor, direct burial wire (RB509 sold separately).