... soures Wavelength :1310,1550 1490 0dBm output, four grapes output,step-4dBm OEM LMS300 High stable optical light sourcesHandheld ... 1490/1550nm wavelength for PON systemOutput power adjust, four grade output, step -4dBmOptional 650nm visible laser sources, detecting fiber ... 1490nm,1550nmEmitter TypeFP-LDOutput Power(dBm)0dBm output, four grapes output,step-4dBmOutput Frequency (Hz)CW/270Hz/330Hz/1KHz/ ...