It can measure the rotational speed of a rotating object to inspect the defect on its surface without adhere any mark.

Product Name:DT-2350AP Stroboscope(50-12,000FPM)
Measurement Range: A:50-12000FPM
Display:5 10mmLED
Accaracy:+/-(0.05%n+1d)
Resolution:0.1 FPM(Less 1000 FPM) 
   1 FPM(Over 1000 FPM)
Sampling time:0.3second
2 ranges: H,L (High,Low) 
Flash adjust:Coarse adjustment,fine adjustment,x2 and /2 for fast check
Triggering Mode:Interior/Exterior 
Temperature:0-40Centidegree
Humidity:Less than 85%RH