Features 1,FAST AND ACCURATE: Optical power meter no need to warm up, plug and play, bring accurate measurement, relative power calculation, calibration function 2,SENSITIVE AND RUGGED: Optical multimeter has sensitive chip and rugged internal structure. Low battery consumption, support 40 hours of continuous work 3,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, ST, FC adapter. Covers most of the requirements of communication engineering maintenance 4,ENERGY SAVING AND ACCURATE: Fiber optic power meter adopt for InGaAs probe, realize accurate measurement, 10 minutes automatic shutdown, energy saving 5,SCRATCH RESISTANT ABS: Fiber tester use excellent ABS material, possess impact resistance, scratch resistance, environmentally friendly Specification Item Type: Mini Optical Fiber Power Meter Material: ABS 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 percent , Logarithmic Display: 0.01dbm Operating Temperature: -10-and60℃ Storage Temperature: -25-and70℃ Automatic Shutdown Time: 10min Battery Last Time: Not less than 40 hours Package List 1 x Optical Power Meter 1 x User Manual 1 x USB Cable 1 x Lifting Rope