Pocket digital tachometer speed is 2.5RPM-99999 rpm, resolution is 0.1 minute, accuracy can reach +/-(0.05%+1) Non-contact tachometer has non-contact speed measurement, high precision, fast measurement speed, reliable and stable, and most importantly, it is safer to use The motor gear of the small motor is made of ABS material, which is strong and wear-resistant, not easy to be damaged, and can be used for a long time. LCD RPM meter has data memory function and automatic detection function. It can save 50 sets of data and can be widely used in various manufacturing industries. The digital tachometer is equipped with a large and clear LCD display, the digital readings are clear at a glance, and it has a low battery reminder function Specifications Material: ABS Color: Gray Power supply: 2 * AAA batteries (not included) Power consumption: 25mA (low power laser), 40mA (high power laser) Working temperature: 0~50C Storage temperature: -20~60C Display: 5-digit LCD, Max.99999 Available distance: 50mm~500mm Sampling time: 0. 5s (over 120RPM) Measuring range: 2 5RPM~99999RPM Resolution: 0.1RPM (2.5RPM~9999RPM), 1RPM(1000RPM~99999RPM) Accuracy: +0.05%rdg + 1digital Size: about 11*6*2 .5cm / 4.33*2.36*0.98in 1. Please allow a little error due to manual measurement. Please make sure you don't mind before bidding.2. The color may vary due to different monitors, please understand. Hello, please pay attention to your delivery address when purchasing products. If your receiving information (such as: name, street, house number, doorbell/email without name, etc. is incorrect, the order will not be delivered correctly.)