Feature:1. [Non Contact Photo Tachometer] This digital tachometer utilizes non contact photo technology, high speed aiming operation, ensuring accurate speed measurement.2. [Large LCD Display] With a large, easy to read LCD screen and 5 digit display, this digital RPM meter allows for convenient reading of RPM values within the range of 2.5 to 99999rpm.3. [Data Storage] This rotation speed meter is able to store upper limit, minimum, and maximum readings, and features an automatic zero adjustment function for seamless operation.4. [Ergonomic Design] The housing of this RPM meter is meticulously crafted for comfortable hand placement, ideal for measuring the rotational speed of motors and machine parts.5. [Wide Application] Widely used in a variety of manufacturing industries such as motors, fans, paper making, plastics, textiles, washing machines, automobiles, airplanes, and ships.Specification:Item Type: Digital TachometerMaterial: ABSBattery: 3 x AAA Batteries (Not Included)Application: Measure Motor, Machine Components, Lathe, etc.Basic Parameter:Display: 5 Digit Large Screen LCD Display, 18mm Word HeightUnit: rpmTest Range: 2.5-99999rpmResolution: 0.1rpm (2.5-999.9rpm), 1rpm (1000-99999rpm)Test Range Selection: AutoTime Base: Quartz CrystalDetection Distance: 50-500mmOperating Temperature: 0-50 (32-122).Package List:1 x Digital Tachometer3 x Reflective Strips1 x User Manual