Description: Universal Port: Support SC, FC, ST three common optical fiber interfaces, plug and work. Seven Wavelengths and Intelligent Memory: Short press the button to switch between 7 test wavelengths to meet various test needs. The last test wavelength is automatically saved when power off. LED Lighting: LED flashlight lighting function, easy to check the line construction in the dark environment. USB Flash Charging: Mini optical power meter can be easily charged by , adapters, laptops, car, and other devices with USB ports, can be used 3500 times when fully charged. Package: Includes an optical power meter, an USB cable, a lanyard, and an user manual. Specification: Measurement Range: -70 to 6dBm Wavelength Range: 800~1700 Uncertainty: ±5% Display Resolution: Linear Display: 0.1%, Logarithmic Display: 0.01dBm Frequency Identification: 0Hz, 270Hz, 1000Hz, 2000Hz Standard Wavelength: 850/980/1300/1310/1490/1550/1625nm Quiescent Current: ≤18uA Automatic Shutdown Time: 10 mins Voltage: 5V Size: 12.5cmx3.4cmx1.7cm/4.92inchx1.34inchx0.67inch Package Includes: 1 Optical Power Meter 1 USB Cable 1 Lanyard 1 User Manual Note: Please allow slightly errors due to manual measurement and different monitors.