The OLM-200 Series Optical Loss Meters combine a Power Meter and a Light Source in one unit, for “bi-directional” optical fiber network installation and maintenance. Economical and user-friendly, the OLM-200 Series also boasts on-board storage for up to 999 items and a built-in USB port, making fiber testing and network maintenance quick and efficient. All OLM-200 Series units also include data management software and a soft carrying case.