This Seco-Larm standalone keypad supports 100 users and one 5A relay output. It includes duress, quick code, wrong-code lockout, egress input, three (3) LEDs, built-in buzzer, and back box. FEATURES: 100 unique 4-8 digit codes, 10,000 possible user code combinations. 1 Output: Form "C" relay output (5A at 28VDC). Stainless-steel face, durable and attractive. Easily delete individual codes. Programmable lockout or duress output after 5-10 unsuccessful attempts to key in code. Output relay activation buzzer - programmable: Sounds while the output relay is activated. Relay output inhibit control. Auto or manual code entry checking: Auto mode: All codes have the same number of digits, no pound key required after each code; Manual mode: Codes can vary in number of digits, pound key must be pressed after every code. Egress input: Lets users exit the protected premises without keying in the code. Built-in tamper (N.C.) circuit. EEPROM memory: Prevents data loss. Power: 12-24V AC/DC. Note: The SESK1011SQ is the upgrade for the SESK983AQ.