The speed of the pocket digital tachometer is 2.5RPM-99999 rpm, the resolution is 0.1 minutes, and the accuracy can reach +\/- (0.05% + 1) Non-contact tachometer has non-contact speed measurement, high accuracy, fast measurement speed, reliability and stability, and most importantly, it is safer to use The small motor motor gear is made of ABS materials, strong and wear-resistant, not easy to damage, and can be used for a long time. The LCD RPM meter has data memory function and auto-detect function. It can save 50 sets of data and can be widely used in various manufacturing industries. The size of the digital tachometer is 10.8x6x3.2cm \/ 4.25x2.36x1.26inch, and it is equipped with a large and clear LCD display for easy-to-read digital reading and a function of low battery reminder