Features 1、[LCD Display] 5 digit large screen LCD display, character height 18mm, time base adopts 6MHz quartz crystal oscillator. 2、[Automatic Memory] Can automatically memorize the maximum value, minimum value, and last measured value. 3、[High Accuracy] It can measure and read at both ends, it is convenient and fast to use, and the measurement results are accurate. 4、[Durable Material] The tachometer is made of high quality ABS material, durable, safe, and can be used for a long time. 5、[Widely Application] This digital tachometer is widely used in tire bearing wind blade speed measurement, industry, etc. Specification Item Type: Tachometer Model: DT-2236C Material: ABS Application: Speed measurement of tire bearing blades Battery: 4 x 1.5V AA (Battery Not Included) Display: LCD display with function prompts Test Range: 2.5 to 99.999 RPM (r/min) Resolution: 0.1 RPM (2.5 to 999.9 RPM), 1 RPM (over 1,000 RPM) Accuracy: ±(0 05%+1 digit) Sampling Time: 0.8 seconds (over 60 rpm) Test Range Selection: Automatic Memory: Automatically memorize the maximum value, minimum value, and last measured value Detection Distance: 50 to 250 mm/2 to 10 inches (LED), 50 to 500 mm/2 to 20 inches (laser) Time Base: Quartz crystal Circuit: Exclusive single chip LSI circuit Package List 1 x Tachometer (Battery Not Included) 2 x Reflective Strip 4 x Accessories 1 x Manual