[750 LUX Stroboscope]Illuminance:750LUX. You can adjust the stroboscopic rate according to the measurement requirements, and the value can be increased or decreased. it has advantages of high brightness, lighting range and it can be easily operated in the dark. [Handheld Stroboscope]The measuring range of this speedometer is 60-49999 RPM, and it has 0.001% high accuracy which is ahead of similar products, So it is suitable for the measurement of motors, fans, pumps and gears. [360 Rotating Dial]Multiplier 360 Rotating Dial which is easy adjust the strobe output by multiplying rotated to the left or right without limit, This is is easy to increase and decrease the value in the daily measurement. [NO Reflective Tape]This LED stroboscope is is used to measure high-speed rotating objects, such as motors, fans, pumps and gears and so on, but it don't need any reflective tape, Just mark or identify existing marks of the equipment under measured, Then you get a high precision value that you need. [Safety Non Contact Strobe Tachometer]-DT50D tachometer is widely used in high-speed rotating objects, such as HVAC Motor Printing ; USB charging method, can work continuously for 8 hours and standby time is 3 months. Display: LCD display Illuminance: 750 Lux RPM Accuracy:0.001% Measuring Range: 60-49999 RPM Operating Temperature: -10-55 Power supply:7.4V/1100mA lithium battery Power consumption: working0.2 W, Continuous working of 8 hours and standby of 3 months Colour:Orange Material:plastic Package Contents: 1 x Digital Handheld Stroboscope 1 x USB cable(Due to different product batches, the appearance , which does not affect the use) Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.