The SLP4-6D kit comes complete with the OLS2-Dual laser source which provides an output of 1310 and 1550nm wavelengths in either continuous wave mode or 2 kHz modulated mode. It offers excellent stability and portability for accurate fiber optic testing. Also included is the OPM4-4C Power Meter which is fully NIST traceable and provides years of accurate measurements. Kit comes complete with carry case.