The PST30 Digital LED Stroboscope Tachometer by Pyle is an easy to use Stroboscope that measures speed and motion analysis! It is fitted with 18 state of the art, super-bright LEDs. The strobe rate can quickly be set anywhere within the full range while making fine adjustments is just as easy. With the PST30 you can analyze speed, motion and vibration on rotating shafts, fans or perform hi-speed motion analysis on speakers, ink-jet printing and more.