Model: DHC6J-M Accumulate counter Voltage: AC/DC 100V-240V (Other voltages can be customized according to user requirements) Counter method: Plus count,reversible A、B、C Display digits: 6 digit and 0.56-inch of LED display Counting range: 0.001-999999 Counting rate: Low speed(≧16.7ms 30counts per second(cps)) High speed(≧1ms 500 counts per second(cps)) Incoming signal: Shock signal or Non-contact signal (Including the electrical signals, sensor signals and so on) High-voltage H: 4V-30V Low Voltage L: 0-2V Input impudence≧4.7K