2 in 1 Digital Laser Photo Tachometer Non Contact and Contact

This is a digital, battery-powered portable optical tachometer operates up to 500mm from a reflective target using a laser light source. It provides fast and accurate RPM and surface speed measurements and combines both contact and non-contact models for use in all applications Features: Higly visible LCD screen with clear and accurate test results With visual laser guide Wide measuring range 99,999 RPM and high resolution Durable and built to last long Can be used in model engines, propellers, wood and metal working to accurately measure the speed of a lathe New surface speed sensor with flute veils to measure speed and length of wire, cable and rope conveniently Specifications: Resolution: *PHOTO/LASER: 0.1 RPM (from 2.5 to 999.9 RPM)  ***1 RPM (over 1,000 RPM) **CONTACT: 0.1 RPM (from 0.5 to 999.9 RPM)  ***1 RPM (over 1,000 RPM) **SURFACE SPEED: 0.01 m/min (0.05 to 99.99 m/min)  ***0.1 m/min (over 100 m/min) Display: Large 5 digit LCD Accuracy: ±(0.05% + 1 digit) Sampling Time: 0.8 sec (over 60 RPM) Time base: Quartz Crystal Automatic Test Range Selection Detecting Range: 50 to 500mm / 2 to 20inch (photo/laser) Memory: Last value, Max. value, Min. value Power: 4 x 1.5V AA Size Battery (not included) Set Includes: 1 x 2-in-1 Digital Photo &Contact Tachometer 3 x Reflective Tape Mark (total600 mm) 1 x Contact speed measurement fitting 3 x Contact rotational speed measurement fitting English Quick Start Guide Standard factory package