Features: 5-Digit Large LCD Display: Large and clear display Uses Common AA 1.5V Batteries: No external power source; convenient to replace batteries Press Pause Button: Count pause; press pause button again to reset the count Input with Common Contact Signal: Sensor selection is simple and convenient; accurate and reliable Resettable Zero: Panel / External Dual Use Seismic Design: Prevents data loss effectively No Mechanical Wear: Reliable operation; long service life Specifications: Power: DC6V-15.5V Battery: 1.5V AA Battery (battery included) Count Range: 0 ---- 99999 Minimum Pulse Width: 0.1 sec Reset Method: Manual Panel / External Maximum Counting Frequency: 20Hz or 20 times/sec Operating Temperature: -5-40°C Minimum Pulse Width: 10ms Sensor Switch: 2 Wires, Length: 110mm, Supplied with Magnet Detection Distance: 3-10mm Size: 63 x 38 x 30 mm Hole Size: 61 x 36 mm Maximum Resistance at Connection Point: ≤ 10kΩ Minimum Resistance at Connection: ≥ 500kΩ Net Weight: 0.05 kg Packaging Includes: 1 x Digital 5-Digit LCD Stamping Counter