The FMM-20 is a new member to the FibreOptica fiber multi-meter (FMM) family. The new design cuts the size to 1/3 and weight less than half of FMM-10. It consolidates a power meter with 2 wavelengths of laser sources. It can automatically recognize the wavelength in use. The palm-size tool is an idea tool for fiber networks installation, troubleshooting and maintenance. The large capacity of data storage, USB interface and PC software make it very convenient for field and laboratory testing.