The Acterna OMK-5 is a Multimode Fiber Optic Test Kit consisting of a a dual wavelength OLS-5 Light Source (850/1300 nm) and an OLP-5 Optical Power Meter. The OMK-5 is ideal for power and loss measurements in multimode fiber optic cables. The OMK-5 features low power consumption, battery-powered instruments contained in a robust case with all needed accessories and cables for test. At only 5 pounds weight, the OMK-5 is perfect for on-site and field applications.