NOYAFA NF-983 Multi-Function OTDR Tester for Optical Fiber Network Cable Testing - Multi-functional Testing: Combines Optical Fiber and Network Cable Testing in one device for increased efficiency, Auto OTDR Test: Automatically sets pulse width and measurement duration, reducing testing time to 5 seconds, Dual Wavelength Support (1310nm 1550nm): Offers flexibility for various fiber testing scenarios with support for two key wavelengths, Optical Power Meter: Measures optical power from -70dBm to 10dBm, ensuring precise and reliable measurements, Visible Fault Locator (VFL): Easily locates fiber faults with strong red light for quick and accurate identification, IP Scan Ping Functions: Includes network tools for testing IP addresses and connectivity, improving network diagnostics, Long Battery Life: Equipped with a 4000mAh built-in lithium battery, ensuring up to 6 hours of continuous use