... wavelength precise measurement 2.Multi adapters:FC, SC, ST, LC 3.Small size,simple operation Optical Power MultiMeter (ST801) Optical Power Multimeter ... clock3. Multi adapters, FC, SC, ST or FC, SC, ST, LC.4. Absolute power measurement dBm or μW5. Relative power measurement ... power off and energy-save design8. High contrast backlit display9. Small size, simple operation Optical Power MultiMeter (ST801)