Support for any reading technology.  A highly sensitive optical sensor identifies the code on the employee card. Optical cards can be dropped in any direction.The LCD window    displays the Time, Date and Card No. The optical card readers can store from 4200 to 6000 punches respective to the  different models. These can be connected directly  to   LAN, TCP/IP network, to PC using RS 232 or RS 485 communication cable depending on the readers model.