RFID Time and Attendance Systems, IN and OUT status User Capacity: 30,000 Transaction Storage :50,000 Communications: RS232 ,RS485, TCP/IP Card reader: EM RFID(Proximity), Mifare(optional) ,HID (optional) Power Supply: 5V DC 2A Standard Function:5 Digit user ID Optional Function: Work Code ,USB Host ,9 Digit User ID Dispaly: Black & White LCD Screen Language: English