UNIVERSAL COUNTER/TIMER. TWO INPUT CHANNELS, CHANNEL A: 10 HZ TO 10 MHZ DIRECT, 1 MHZ TO 100 MHZ PRESCALED. CHANNEL B: 10 HZ TO 2.5 MHZ. PERFORMS FREQUENCY, TIME INTERVAL, PERIOD, RATIO(A TO B), AND TOTALIZE FUNCTIONS. INCLUDES OPTION 001, HIGH STABILITY TIME BASE. AC POWER CORD PROVIDED, NO OTHER ACCESSORIES. REMOVED FROM SERVICE, EXCELLENT CONDITION.