Noyafa 4 in 1 Fiber Optical Power Meter Visual Fault Locator NF-916 VFL REF FC SC ST Rj45 Fiber Optic Cable Tester Network ToolsProduct Function:1. Optical Power Meter Functiona). Optical power measurement: supports 850/980/1310/1490/1550/1625nm wavelengthb). Unit switching: dBm or mW/uW/nWc). REF referenced). Optical power frequency test: can identify light sources with 270Hz, 1KHz, and 2KHz frequencies.2. Cable Continuity Testing:Used to detect line sequence, short circuit, open circuit, crossover, etc. of network cables, and display the results in the form of line sequence lights and the screen.3. Red Light Function: Supports 3 modes of constant light, slow flash, fast flash.4. Crystal Head Crimp Test Function:Check whether the crystal head is crimped well.Product Description:Brand: NOYAFAProduct Name: Optical Power MeterType: NF-916Dimension(LxWxD): 127x61x32mmDisplay: Color screenOptical power measurement: 850/980/1310/1490/1550/1625nmAutomatic shutdown: 30 minutesLighting function: YesCharging method: Type-C charging, 3.7V lithium batteryPackage Include:1Pcs x NF-916 Network Cable Tester1Pcs xType-C Data Cable1Pcs xUser Manual1Pcs xWarranty Card1Pcs xToolkit