PC+ABS material shell with PMMA panel design Equipped with the 32-bit high-speed processor Built-in audible beeper Display the reader status with LED indicator DIP switch RS485 and Wiegand(W26/W34) protocol Tamper-proof alarm Online upgrade function(under the 485 communication mode), and card reader can degrade to pre-upgrade status in case of upgrading failed Watchdog design for repairing itself in case that exception occurs, to en