Features:
1. Two optical ports, 4-wavelength selectable
Adjustable output power
LCD with back light for operation in dark environment
Modulation frequencies 270Hz, 1KHz, 2KHz, 2Hz (@650nm)
Automatic wavelength recognition

                  Functions      MLS-4B  
Emitter type            LD  
Connector Type          FC/PC (SC/PC, ST/PC optional)  
Wavelengths ( + 20 nm)  650  1310  1490  1550  
Output power           1 mW  -5 dBm  -5 dBm  -5 dBm  
Spectral width           5 nm