Features:
500 users can have PIN credentials for granting access
Smooth attractive design, with anti-vandal construction
Highly-sensitive Piezo metal keys
3 operational Security Levels can be selected with special PIN codes 
Supports up to 8-digit PIN codes, with timed wrong code lockout after several wrong attempts  2 tri-colored LEDs and integral sounder for programming and operation  Wide range of low voltage AC/DC power input