CM 203 : Is a standalone card Time Attendance product built - in Linux operation system and proximity card sensor. The identification speed is with in <=1 seconds. Flash drive support V 2.0 to solves the problem of no PC in local site. CM-203 is the best of card time recorder under standalone. Also, it?s designed to connect with network system by RS 232 ,RS 485 and TCP/IP. Moreover, there are many features that are created for supporting the card time attendance reader. CM-203 provides a good solution for efficient management of a company with 30000 -50000 staff also.