Powerful , Fall resistant and durable. High precision optical power. Different interfaces can be replaced, The operation is simple and practical. Reduce the damage of falling to the machine. At the same time, press the +LIGHT key to enter the school. Quasi-mode, the screen letter "dBm"is not displayed Press ZERO to save and exit calibration mode The screen letter "dBm"is redisplayed Power measurement range:-70-+10dBm Detector type: InGaAs Wavelength range:800-1700nm Standard wavelength nm:850/980/1300/1310/1490/1550/1625 Display resolution: tineardisplay 0.1, Logarithmic display:0.0ldBm working temperature(C):-10-+60℃ Storage temperature(C):-25-+70℃ Automatic shutdown time(min): Notless than 40 hours Output power of Visual Fault Locatorpen:650nm Material:ABS colour:blue Package Contents: 1 x Optical Power Meter 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.