Item Type:Mini Optical Fiber Power Meter Detection Distance of Red Light Source:10km Power Supply:Built in 1 x 3.7V lithium battery, Capacity: 650mah Probe Type:For InGaAs Wavelength Range:850-1650nm Standard Wavelength(nm):850, 980, 1270, 1300, 1310, 1490, 1550, 1577, 1625, 1650 Display Resolution:Linear Display:0.1%, Logarithmic Display:0.01dbm Operating Temperature:-10-+60℃ Storage Temperature:-25-+70℃ Automatic Shutdown Time:10min Battery Last Time:Not less than 40 hours How to Use:Boost and use directly. Type: DC70(-70-+10DBm) Colour:As Shown Material:Metal Package Contents: 1 * Optical Fiber Power Meter 1 * USB cable 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. COMMON INTERFACE: Mini optical fiber power meter has 10 wavelength and light source, 850, 980, 1270, 1300, 1310, 1490, 1550, 1577, 1625, 1650nm and SC, , FC adapter. Covers most of the requirements of communication engineering maintenance ENERGY SAVING AND ACCURATE: Fiber optic power meter adopt for InGaAs probe, realize accurate measurement, 10 minutes automatic shutdown, energy saving SENSITIVE AND RUGGED: Optical multimeter has sensitive chip and rugged internal structure. Low battery consumption, support 40 hours of continuous work FAST AND ACCURATE: Optical power meter no need to , plug and play, bring accurate measurement, relative power calculation, calibration function SCRATCH ABS: Fiber tester use excellent material, possess impact resistance, scratch resistance, environmentally friendly