Large measuring range (from 2.5 to 99999 RPM) and high resolution (from 0.1 to 1 or 1 RPM). Automatically record the MAX. value, Min. value and Last value with low battery indication. Capable of measuring at a distance of 2-20in (50-500mm) with a large LCD display. 0.8 Second sampling time and 18mm 5-digit LCD display with non-contact RPM measurement. Non-contact digital photo tachometer with stable performance. Wide use: usually can be used in the field of motor, wheels, lathe for metal or wood cutting work, electric fan, papermaking, plastic industry, chemical fiber, washing machines etc. Specifications: Color: Dark Gray Material: ABS PLASTIC Display: 18mm (0.7") 5-digit LCD display Measuring range: 2.5RPM - 99.999RPM Resolution: 0.1RPM at 2.5-999.9RPM, 1RPM at 1000-99.999RPM Accuracy: (0.05% + 1 digit) Measuring distance: 50-500mm / 2-20in Time base: 6MHz crystal oscillator Test range selection: Automatic switching Sampling time: 0.8s (over 60 revolutions per minute) Function: Display last value, MAX value, min value Power supply: 1 * 9V 6F22 battery (NOT included) Power consumption: about 30mA Working temperature: 0-50 (32) -122)! 130 * 70 * 29mm / 5.12 * 2.76 * 1.14in! Product Weight: 79g / 2.80oz! Package Size: 15 * 9.3 * 5cm / 5.91 * 3.66 * 1.97in! Package Weight: 113g / 4.00oz! ! Note: 1. You must stick the reflective tape onto the target object before measuring. 2. Do not point the laser beam directly towards eyes; safety eyewear is recommended. 3. Do not use it near explosive gases or in other potentially explosive areas. Package List: 1 * Digital Tachometer 3 * Reflective Tape Marks 1 * User Manual (English) 1. You must stick the reflective tape onto the target object before measuring. 2. Do not point the laser beam towards eyes directly; safety eyewear is recommended. 3. Do not use it near explosive gases or in other potentially explosive areas. Package List: 1 * Digital Tachometer 3 * Reflective Tape Marks 1 * User Manual(English)