Fangrui Product Details 1. Fast And Accurate: This Three In One Power Meter Is Equipped With A Highly Sensitive Chip That Delivers Quick And Precise Measurements, Without Requiring Any Preheating Time, Simply Plug And Go. 2. Advanced Features: This Multifunctional Tester Boasts A Range Of Features, Including Relative Power Calculation, Calibration, And Automatic Shutdown Functionality For Added Convenience. 3. Wide Wavelength Coverage: With A Wavelength Range Of 850 To 1650nm, This Optical Power Tester Caters To The Majority Of Communication Engineering Maintenance Needs. 4. Long Light Distance: This Optical Power Meter Uses A Red Light Source To Detect Faults From Up To 15km Away, Making It A Highly Effective Tool For Locating Faults Quickly And Efficiently. 5. Rj45 Network Test: In Addition To Power Testing Function, This Device Also Includes Rj45 Network Testing Capability, Allowing You To Quickly Check And Correct Network Cable Wiring. Specification: Item Type: Optical Fiber Power Meter Power Test Range: Aua-d5 -50-+26dbm