EMX prx-320 Stand-alone unit is appropriate for use on gates or doors where there is need for resistance to climatic conditions. Use it as a keypad for some users and as a proximity card reader for others holds 8 keypad codes and 2000 cards use cards carx-20 sold separately Powered by 12V DC supply Can be used on solar installations Has the option of using a built-in contact for doorbell enunciators.