MUW&reg; XINTEST HT522 Digital Contact/Non-contact Tachometer Handheld Rotating Speed Scale Meter 6 Digits LCD Display Digital Contact/Non-contact 6 digits LCD Display Tachometers Provides quick, accurate contact and non-contact measurement of the speed and rotating speed on the object surface. Wide measuring range, high resolution.Laser target;Data hold Contact measurement range:2-20000RPM;Non-contact measurement range: 2-99,999 RPM The visible digital liquid crystal display and backlight display;Low battery indication