Info Features Specs The 301 digital O.A.T. replaces one of the most difficult instruments to read in the cockpit, and is particularly helpful for night or IFR flying. Minimum panel space Light weight Automatic dimming Miniature remote probe LED display Engraved Faceplate Weight: 4 oz. Operating Temp.: -25°C to +60°C Accuracy: ±1% of full scale Range: -40°F to +199°F (-40°C to +100°C) Input Voltage: 14 volts/ 28 volts Input Current: 150 M.A. Max.