Inner Range EliteX Standard Keypad Housing Dimensions: 152h x 90w x 18d mmInstallation Environment: 0 Degrees - 50Degrees C @ 15% to 85% relative humidity (non-condensing)Electrical Input Voltage: 11V - 14V DCOperational Current at 13.7V DC: 14.4mA (Back-light & LEDS off), 42mA (Back-light & LEDS max brightness)Operations Current @ 13.7V DC SIFER Model: 46mA (Back-light & LEDS off), 186mA (Peak, Back-light & LEDS max brightness)Auxiliary Open Collector Output Current: 18VDC, 500mA maximum each (PTC protected)Display & Indicator Brightness Display/ Keypad: Variable brightness via programming (Can be turned off)LED Indicators: Variable brightness via programmingIndicators & I/Os LED Indicators: 8Aux Outputs (Open collector): 2Universal I/Os: 2 (Input mode is compatible with original Elite, or EOL/Multi-state compatible)