Water-proof RFID Reader, Support RS485, Wiegand34 protocol 13.56MHz(Mifare) 125KHz(EM-ID) Water-proof design An indicator light with red, green, and blue light Watch dog function ensure device free from halting Surface mounted installation IP66 (Apply silica gel to gaps between the device and the wall. Liquid sodium silicate is recommended. For details, see the quick start guide.)