Automatically uses the proper calibration parameters when combined with the FLS-300 or FOT-300 source units. With a high-power option and 10 calibrated wavelengths, the FPM-300 is the most complete, yet simple power meter available. Combined with the FLS-300 or FOT-300 source units, which can transmit with a wavelength-identification digital encrypted protocol, the FPM-300 automatically uses the proper calibration parameters. This auto-wavelength recognition feature reduces the need for communication between the two technicians and decreases the potential for error.