These extremely robust and precise hand-held stroboscopes are used to conduct measurements in difficult industrial environments and are specifically designed for maintenance work / commissioning and inspections. Number of LEDs 40 Frequency range 30 ... 300,000 FPM Light intensity max. 1,750 LUX @ 1° / 30 cm Flash duration adjustable Power supply Integrated Lithium-ion batteries for up to 7 hours continuous use