... temperature arrange 4. usb, tcp/ip, rs232/485 D/Mifare/HID Card Time Clock HF-K300 Product Introduction: Elegant design, four ... usd in different locations via network. Can be hung on wall; Developed based on LINUX platform; Can download the Time and ... ×136×36mm Standard Functiom: Workcode, function key, schedular bell Optional: HID Card, Mifare Card, Simple access control, backup power supply, Modem ...