MG236B is a vandal resistant proximity RFID card and keypad access control unit suitable for external applications. The unit accepts up to 1000 users and provides entry via the use of proximity cards and/or pin codes.   You can buy situble EM Cards (Find it Here ) or Key Cards from our store (Find it Here ) Specifications: Operating Voltage: 12VDC+10% , Current 1.2A Lock Relay: 12VDC/2A Environmental temperature working:0℃~45℃ , storage: -10℃~55℃ Relative humidity working: 40%~90%RH;storage:-20%~90%RH RFID Card Capacity: 255 cards, a “Personal PIN” goes alone with each card 4-digits public PIN Capacity: 1 Proximity Reader Frequency: 125KHz Compatible Cards: EM or EM compatible cards Card Reading Distance: 5~15 Cm You can buy the Protective Plastic Cover for it (it is available as additional option) it will protect the buttons and device from water , dust , ....