3 in 1 Optical Power Meter Network Tester Multifunctional Accurate Optical Fiber Power Meter Item Type: Optical Power Meter Material: ABS Model: TM570AL Wavelength Range: 800-1700nm Optical Connector: Universal connector (SC FC ST) Interface Type: InGaAs Measurement Accuracy Error: andlt ±5 percent Standard Measurement Wavelength: 850 980 1270 1300 1310 1490 1550 1577 1625 1650nm Display Resolution: Linear display 0.1 percent , logarithmic display 0.1dBm Identifiable Frequency: 270Hz, 300Hz, 1kHz, 2kHz Power Supply: Li battery 3.7V capacity 700mah (built in) Interface: Micro USB Battery Duration: ≥120h (optical power meter function) Automatic Shutdown Time: 10 minutes Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.