DC 12V Idle Current_25mA Lock output load_1A Alarm output load_1A Ring bell load_1A Card reading distance 40mm Max Card Frequency_ 125KHz for EM and HID 13.56MHz for Mifare Card transmission format 26-37 bit wiegand Keypad transmission format_4bit,8bit and Virtual card number Operating Temperature_-45°C_55° C Operating Humidity_0%_95% Size_ 145_58_22mm Installation_ 1) Remove the back cover from the keypad using the supplied special screw driver 2) Drill 2 holes on the wall for the Self tapping screws and I hole for the cable 3) Put the supplied rubber bungs to into the two holes 4) Fix the back cover firmly on the wall with 2 Self tapping screws 5) Thread the cable through the cable hole Attach the keypad to the back cover_