Features:• RS-485 protocol• Default IC (Mifare) card• Support card, password• All-metal buttons with blue backlight• Watch dog function ensure device free from halting• Beep and indicator• Surface mounted installation• Tamper alarm and vandal-proofTechnical Specifications:System• Main Processor 8 BitRead• Read Format 13.56MHz(Mifare)/125KHz(EM, Optional)• Read Range 3-5cm (max.)• Response time <0.1sFunction• Tamper Alarm YesInterface• To Controller RS485General• Keypad 12Key(0-9,*,#), number key 5 is a braille button• LCD Display Blue backlight• Beep Tone Buzzer• Ingress protection IK08, IP55• Power Supply 9-15VDC/100mA• Working Environment -30?-+60?• Working Humidity =95%• Dimension(W× D× H) 110mm*85mm*26mm• Weight 0.5Kg