ACCURATE MEASUREMENT: High-precision, aiming, non-contact and safe digital tachometer, fast measurements from 2.5 to 99999 rpm, with a detection distance of 50 to 500 mm. LCD DISPLAY: Designed with a backlit LCD display, it displays values clearly, allows easy reading of data even in the dark, and displays a battery icon in case of low consumption. MORE FUNCTIONS : Multi-function tachometer functions with data logging (60 readings), logging interval setup, data hold, max/min/avg. metering, auto shut-off to save power. COMPACT DESIGN: Well-made tachometer, comfortable to grip, powered by 1 x 9V 6F22 battery, has a lightweight and portable body, convenient to carry anywhere . WIDE APPLICATION: This tachometer is suitable for measuring the rotational speed of model cars, machines, engines, wheels, lathes for metal or wood cutting work, etc. Note: This product does not include batteries, please bring your own batteries