The FPM100B from SHANGHAI TARLUZ TELECOM TECH. CO., LTD is a Optical Power Meter with Measurement Range(Power) -50 to 26 dBm, Wavelength Range 800 to 1700 nm, Calibrated Wavelength 850 nm, 980 nm, 1300 nm, 1310 nm, 1490 nm, 1550 nm, Resolution 0.01 dB. More details for FPM100B can be seen below.