"INTERNAL OSCILLATOR 10 MHZ 1 PPS SELECTED LOW RATE AND SELECTED HIGH RATE OUTPUTS, IRIG B 122, NASA 3 6 BIT OR 2137, RS-232 IEEE-488 COMPUTER INTERFACE,OPTIONS OF B5 INTERNAL OSCILLATOR, SINEWAVE OUTPUT, FRONT PANEL POWER SWITCH EXTENDED TEMPERATURE LCD DISPLAY, 1PPS TIME AND POSITION HORIZONAL ACCELNAL ACCELERATION CONSTANT"