Features: 1. The network test auxiliary machine of the upgraded optical power meter can be directly loaded into the host, which is more convenient to carry and more flexible to use. 2. New integrated network test assistant. Innovative upgrade, the auxiliary machine and the host are integrated, which is more convenient than the old one. 3. Small size and powerful performance. 4. Added network cable test. Accurately test whether a single network cable transmits signals normally. Press and hold the UNIT button for 3 seconds to open the RJ45 test mode, and then press to turn off the RJ45 test mode. 5. Add LED night illumination to facilitate the construction of the cable under dark conditions. 6. Added wavelength memory function. Added wavelength memory function, remember the test wavelength set before shutdown after shutdown. 7. The rubberized outer casing protects the machine from damage caused by accidental fall. 8. Press (LIGHT+LED) in different environments to turn the backlight of the screen on or off at will. 9. DIY self-calibration. Press +REF+UNIT at the same time to enter the user mode screen to display the letter "CAL". Press the "REF" and "UNIT" buttons to restore the power meter to the factory state. 10. Built-in lithium battery. Connect the Android charging cable directly when charging. There is no need to disassemble the built-in over-current protection circuit of the battery to effectively protect the machine from damage due to over-charging. 11. It can identify the fiber transmission frequency and accurately identify the fiber transmission frequency. It can be used to judge the illumination mode during construction and whether it is continuous/intermittent illumination. 12. 15 km red light, the penetration distance is longer, the service life is longer. Specifications: Wavelength range: 800 to 1700 Connector: FC/SC/ST Detector type: InGaAs Measuring range: Type A: (-70 to +3) Uncertainty: ±5% Standard wavelength (nm): 850 nm, 1300 nm, 1310 nm, 1490 nm, 1550 nm, 1625 nm Display resolution: Linear display: 0.1% Logarithmic display: 0.01dBm Red light working wavelength: 650nm Working temperature (°C): -10 to +60 Storage temperature (°C): -25 to +70 Automatic shutdown time (min): 10 Battery continuous working time (h): ≥ 48 Meter size: Approx. 118*68*30mm/4.65*2.68*1.18in Power: AAA battery * 2(Not Included) Package List: 1 * Optical Power Meter 1 * USB Charging Cable 1、The network test auxiliary machine of the upgraded optical power meter can be directly loaded into the host, which is more convenient to carry and more flexible to use. 2、New integrated network test assistant. Innovative upgrade, the auxiliary machine and the host are integrated, which is more convenient than the old one. 3、Small size and powerful performance. 4、Added network cable test. Accurately test whether a single network cable transmits signals normally. Press and hold the UNIT button for 3 seconds to open the RJ45 test mode, and then press to turn off the RJ45 test mode. 5、Add LED night illumination to facilitate the construction of the cable under dark conditions.