This controller enables you to combine up to four card/fingerprint readers, four electronic locks, four door sensors, four exit buttons, and various alarm functions into an integrated computer-managed system (readers, locks, sensors, exit buttons, and alarm devices available separately). It communicates with your readers via its Wiegand and RS-485 interfaces, and with your computer system via TCP/IP RJ45 and RS-485. With a storage capacity of 16MB, the controller can recognize up to 100,000 card holders, and can store up to 150,000 event records.