... of single/double/three-wavelength continuous light and all functions of SAT-4E seriesoptical power meter, and the wavelength of light source :650nm ,850nm ... ) Output stabilitydB±0.03dB/15min ; ±0.05dB/8h Wavelength of optical power meternm850,980,1300,1310,1490,1550,1625Measurement rangedBm-70~+10 ...