Model Number: DT2234C This non-contact tachometer is a professional and practical motor speed meter designed to measure revolutions per minute (RPM) with a wide measuring range and high resolution. It offers high accuracy, fast measurement response, and a long detection distance of up to 500mm (20 inches). The tachometer is easy to usesimply apply the included reflective tape (3 pieces included) to the target object, then aim the beam at the marked spot. It is suitable for a wide range of applications, including measuring the rotational speed of machinery, motors, wheels, lathes for metal or wood cutting, electric fans, paper manufacturing, plastic industry, chemical fibers, washing machines, automotive production, and more. This handheld digital photo tachometer delivers stable performance and automatically records the maximum value, minimum value, and last measured value, with low battery indication. It supports non-contact RPM measurement from a distance of 2 to 20 inches (50500mm) and features a large LCD display. Sampling time: 0.8 seconds Display: 5-digit, 18mm (0.7 inch) LCD Measuring Range: 2.5 RPM to 99,999 RPM Resolution: 0.1 RPM for 2.5999.9 RPM; 1 RPM for 1,00099,999 RPM Accuracy: (0.05% + 1 digit) Time Base: 6MHz Crystal Oscillator Range Selection: Automatic switching Functions: Display last value, maximum value, minimum value Power Supply: 1 x 9V 6F22 battery (not included) Power Consumption: Approx. 30mA Operating Temperature: 050C (32122F) Product Size: 130 x 70 x 29mm (5.12 x 2.76 x 1.14 inches) Product Weight: 79g (2.80 oz) Notes: 1. Reflective tape must be attached to the target object before measurement. 2. Do not point the beam directly into eyes; safety eyewear is recommended. 3. Do not use near explosive gases or in potentially hazardous environments. Color: Black + Brown Material: Plastic Package Contents: 1 x Digital Tachometer (Other items not included) Note: Lighting and display differences may cause slight color variations between the product image and actual item. Measurement error allowance: +/- 13cm.