FAST & ACCURATE: Optical power measurement requires no warm-up, just plug and play, providing accurate measurement, relative power calculation, and calibration function. SENSITIVE & ROBUST: Optical multimeter has a sensitive chip and robust internal structure. Low battery consumption, supports 40 hours of continuous work. COMMON INTERFACE: Mini optical fiber power measurement has 10 wavelengths and light source, 850, 980, 1270, 1300, 1310, 1490, 1550, 1577, 1625, 1650nm and SC, ST, FC adapter. Covers most communication technology maintenance requirements. ENERGY SAVING & ACCURATE: Fiber optic power measurement adopts InGaAs probe, realizes accurate measurement, 10 minutes automatic shutdown, energy saving. SCRATCH RESISTANT ABS: Fiber tester uses excellent ABS material, has impact resistance, scratch resistance, and is environmentally friendly. Item Type: Mini Optical Fiber Power Measurement Material: ABS Red Light Source Detection Distance: 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 Life: Not Less Than 40 Hours Package Includes: 1 x Optical Power Meter 1 x User Manual 1 x USB Cable 1 x Lifting Rope