Begin your security upgrade with the AIPHONE ACS-2DR-C Master Door Controller Starter Kit. It's designed to manage 2-8 doors, perfect for small to medium-sized facilities. The kit includes a master door control board housed in a steel-ventilated, lockable enclosure for added security and durability. As a new item, expect top-notch condition and performance. Whether for home or business use, this door controller kit offers a reliable and efficient access control solution.