... 26, ADSL and GPRS (optional)Card ReaderMifare one or Proximity CardDistance2. 5-10 cm (Mifare one card), 2. 5 ... (access control)Connect to external E-lock, external card reader and indicator lightMultimedia functionsMusic, slide advertisement, notice etcPower supplyDC12V, ... .5 hoursTemperature and humidity0 - 45, 20%-80%ApplicationsOffice, star-hotel, villa, bank, government, top grade community etc