Features: Five large screen LCD display, large and clear to read to data. Use ordinary 5 batteries, no external power supply, and the battery replacement is convenient. Press the PAUSE button to pause / count, then press the PAUSE button, and count again. The input of ordinary contact signal, select the sensor is simple and convenient, accurate and reliable count highest count speed: 20 times per second, 1200 times per minute Descriptions: Reset: panel / external dual-use With anti-seismic design, effectively prevent data from losing. No mechanical wear, reliable work, long service life. Specifications: Model: TT-5J Power: by 1.5V AA battery Working temperature: 5--40 Maximum count frequency: 20HZ Count minimum pulse width: 10mS Counting range: 0---99999 Hole size: 61*36 mm Maximum resistance on contact: 10K Minimum resistance on contact: 500K Size: 64*38*38mm/2.5"*1.5"*1.5" Color: white Package Included: 1 x Digital Punch Electronic Counter 1 x Mounting Bracket 1 x Magnetic Proximity Switch 1 x Magnet Notes: Due to the difference between different monitors, the picture may not reflect the actual color of the item. We guarantee the style is the same as shown in the pictures. Please allow slight measurement deviation caused by manual measurement, thank you for your understanding.