... 485, optional GPRS·Large-screen color LCD display, 3.5 inches TFT.·High-definition graphical interface, a graphical interface ... (access control)Connect to external E-lock, external card reader and indicator lightMultimedia functionsMusic, slide advertisement, notice etcPower ... 240 V, 50 to 60 Hz )Backup battery (optional)3.5 hoursTemperature and humidity0 - 45, 20%-80%ApplicationsOffice, star ...