... multi-function attendance recording machine,punched-card machine, ARM Processor ER-881 attendance machine (RFID multi-function attendance machine) ... access control functions in one that Based on the ARM Processor, Can multi-task real-time concurrent processing, can store ... 550g. ER-881 Multimedia Time Attendance and Access Control,ARM Processor,support M1 card, ID card,Support 485 communication and TCP ...