Feature:1. Laser Measurement: Adopting non contact laser aiming and measurement, the highly accurate tachometer can test the RPM and speed of various machine.2. Clear LCD Display: Designed to have 0.77in LCD display, the photo tach meter with 2.5~99999RPM wide measuring range enables convenient operations.3. Various Functions: Able to store upper limit, minimum, and maximum results, the tachometer gauge tool also comes with automatic resetting function.4. Wider Application: Widely used on motors, fans, papermaking, plastics, chemical fibers, washing machines, automobiles, airplanes, ships and so on.5. Simple in Carrying: Light in weight and compact in size as well, the RPM tachometer is very simple to carry and store for indoor and outdoor works.Specification:Item Type: Digital TachometerModel: DT-2234C+Material: ABSBattery: 1 x 9V 6F22, without battery. Use: Can be used for measuring motors, machine components, lathes, etc. Display: 5 digit, 18mm, that is, 0.77in LCD with alarm function. Accuracy: (0.05%+1 digits), expressed as % of reading + LSB. Sampling Time: 0.8 Seconds.Test Range Selection: AutomaticTime Base: Quartz CrystalDetection Distance: Approx. 50 ~ 500mm / 1.97 ~ 19.69inTest Range: 2.5~99999RPMWorking Temperature: 0-50, that is, 32-122. Resolution: 0.1RPM for 2.5~999.9RPM. 1RPM for over 1000RPM. .Package List:1 xDigital Tachometer3 x Reflective Strip1 x Storage Bag1 x User Manual