The internal proximity reader is a quick and easy way to allow multiple people to set and unset a system away from the main security control panel. Proximity tag reader to set or unset the system; also works as a set or unset controller. Can be used with proximity tags or cards. Backlit symbol indications for alert, alarm, tamper, fault and unset. Can be set to have either 2 inputs or 2 outputs, or 1 input and 1 output. Physical dimensions: 97 x 40 x 23 mm. Operating voltage: 12Vdc Nominal (9-15 Volt DC Range). Security Grade 3.