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 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. 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 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(No Battery). Note: Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering.