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 Tachometer Material: ABS Battery: 3 x AAA Batteries (Not Included) Application: Measure Motor, Machine Components, Lathe, etc. Basic Parameter: Display: 5 Digit Large Screen LCD Display, 18mm Word Height Unit: rpm Test Range: 2.5-99999rpm Resolution: 0.1rpm (2.5-999.9rpm), 1rpm (1000-99999rpm) Test Range Selection: Auto Time Base: Quartz Crystal Detection Distance: 50-500mm Operating Temperature: 0-50℃ (32-122℉). Package List: 1 x Digital Tachometer 3 x Reflective Strips 1 x User Manual