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, 4-6 V DC Powered with Outputs for User Supplied NICAD Battery Back-Up, Capable of Signal Powered Operation. Slim Bezel Case.