With an emphasis on innovation and sustainability, you can trust the Keyscan CA4500 access control unit for smart access control technology and system design flexibility. Keyscan CA series of door controllers are compatible and merge security with convenience. The CA series can satisfy any new installation requirement or augment existing Keyscan systems while, in many cases, utilizing existing infrastructure including credentials. CA4500 includes: CA4500B ACU board, 1-OCB8 relay board, 1-DPS-15 power supply, 1-black metal enclosure with lock and tamper switch.