Application: 2 in 1 (Engine & Laser tachometer ) Applicable to the product departments of motor, fan, paper- ... product, plastics, Application: 2 in 1 (Engine & Laser tachometer ) Applicable to the product departments of motor, fan, paper ... 3.Competitive price, high-quality,automatic! 4.Easy to use Measurement Range: A: 50~12000FPM B: 50~40000 FPM C: 50 ...