If you are looking for a digital tachometer to measure the rotation speed of small engines, automotive tyres, gears, fans and so on, this will be a perfect one to have. How so many functions hiding in this small digital tachometer! Hold Function When you wish to hold a reading you are measuring, just release the measuring trigger, the digital meter will enter Hold Mode automatically, and the reading will freeze on the display. Max/Min/Avg Value Measurement Function Press Max Button one time to choose Max reading, twice for Min reading, three times for Avg reading, and four times back to normal mode. Backlight Function Press Backlight Button to turn on/off the backlight Auto Measuring Function Press the Auto button to enter auto measuring mode. Press this button again to exit auto measuring mode. Record Function Under auto measuring mode press the REC button to start recording measurements (max 60 readings)Specifications Measuring Range: 2.5-99999 RPM Resolution: 0.1RPM, at 2.5~999.9RPM; 1RPM, at 1000~99,999 RPM Accuracy: ±0.02%+1 digital Measuring Distance: 1.97 to 19.7 inch (50~50mm) Sampling Time: 0.5s (above 120RPM) Data Storage Capacity: 60 Readings Auto Power Off: after 20s Operation Temperature: 0 to 50℃ (32 to 122℉) Operation Humidity: 10 to 90%RH Storage Temperature: -10 to 60℃ (14 to 140℉) Storage Humidity: 10 to 75%RH Dimension: 145*85*35mm(5.7*3.35*1.38 inch) Weight: 0.26lb/120g (including 9V battery)Package 1x Digital Tachometer 1x Carrying Bag
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