A Versatile Event Counter/Totalizer Featuring,19999 Counts with Overrange Indication, or 9999 Counts with Cascade Output, Contact Closure or Logic Signal Input, High Contrast 0.48" 4.5 digits LCD, AC Powered with Outputs for User Supplied NI-CAD Battery Back-Up. Slim Bezel Case. 110 V AC power version of PC-45X