The ST-3205A from Sunma International Industry Ltd. is a Optical Power Meter with Measurement Range(Power) -60 to 3 dBm, Wavelength Range 800 to 1700 nm, Calibrated Wavelength 850 nm, 980 nm, 1310 nm, 1550 nm, Resolution 0.01 dB. More details for ST-3205A can be seen below.