... 3.RS232/485, TCP/IP, USB Big Capacity Fingerprint Time Attendance and Access Control System(Model No:iClock880) Introduction:iClock880 ... and make T&A application more visible and reliable. 2. Time & Attendance Built-in backup battery protects data.Storage Capacity: ... Control Monitor employee's movement at any time. Provide extra security with 50 time zone, user grouping, and professional unlocking ...