Brand New and High Quality Features: Five large LCD screen, large and clear. Uses common AA batteries, without external power supply, and battery replacement is convenient. Press the PAUSE button to pause/count, press the PAUSE button again and resume counting. The input uses the common contact signal. Sensor selection is simple and convenient, and the counting is accurate and reliable. Maximum counting speed: 4 times/second. Resettable zero: panel/external dual function. Seismic design effectively prevents data loss. No mechanical wear, reliable operation, long lifespan. Specification: Power: 1.5V AA battery Resettable zero mode: panel/external Counting range: 0~99999 Resettable zero minimum pulse width: 0.1 second Maximum counting frequency: 4HZ Operating temperature: -5~+40 ℃ Minimum pulse width for counting: 50mS Contact maximum resistance: 1K Ohm Contact disconnection minimum resistance: 500K Ohm Dimensions: 63x37x30mm/2.48x1.46x1.18inch, wire length: 110cm Color: White & Black Quantity: 1 Set Note: 1. Please allow 0-1cm error due to manual measurement. Please make sure you do not mind before you bid. 2. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you! Package includes: 1 x LCD Display Digital Electronic Punch Counter (without battery) 2 x Microswitches