The Linear AK-11 is an upgraded version of the Linear AK-1. The Linear universal wired keypad will work on any gate or garage door operator. Self-contained keyless entry system ideal for airports, hospitals, warehouses, office buildings, parking lots, and many other commercial facilities. Operates at 12 or 24 Volts AC or DC. Rugged, cast aluminum enclosure for indoor or outdoor mounting on a wall or pedestal. Four independent outputs and timers: two form C relays and two solid-state open collector outputs. Up to 480 programmable input codes of one to six digits each for activating either or both relays. Two LED indicators show system status. Key operating features include: door sense input; inhibit input; request-to-enter input; alarm shunt output; timed anti-passback; and keypad lockout. Down light illuminates whenever keypad is used. Tactile and audible feedback. Keylock secures keypad to mounting backplate. Stand alone to open a single automatic gate or garage door. This unit will accept up to 480 individual codes. Product Number: ACP00738.