M803 Digital Clock Chronometer, O.A.T., Voltage Gauge | 5V Orange LightingThe M803 provides universal, local, flight and elapsed time with display annunciators. It also provides Outside Air Temperature (O. A. T.) and voltage readout. Flight time is recorded in hours and minutes, and includes an alarm with an external output for flight and elapsed time. Two buttons control clock features with another switching O. A. T. and voltage. The 803 5V has 5V orange lighting and remote temperature probe.