The ST-3201 from Sunma International Industry Ltd. is a Optical Power Meter with Measurement Range(Power) -75 to 6 dBm, Wavelength Range 850 to 1550 nm, Calibrated Wavelength 850 nm, 980 nm, 1310 nm, 1480 nm, 1550 nm, Resolution 0.01 dB. More details for ST-3201 can be seen below.