... 650nm visible light source and the 1310/1550nm wavelengths for single mode fiber or the 850/1300nm wavelengths for multimode fiber, as ... power meter, it is a perfect solution for fiber optic network applications.FeaturesProvides 1~6 wavelengths output which ... Light Source, 3pcs 1.5V Batteries, Power Adapter, User Manual, , Cotton Stick and Soft Carrying Case. JW3111 optical light source DC Viusal Cable ...