Feature: 1. Support single or multiple work, with great workmanship, can perfectly meet your needs. 2. There is no welding joint in the middle of the fiber and disc structure design, small in size, light in weight and easy to carry. 3. Hook type carrying to meet different usage scenarios, thereby improving work efficiency. 4. This product has high accuracy and can provide you with an accurate test result. 5. With strict quality control and quality assurance, high safety factor, can be used with peace of mind. Specification: Item Type: OTDR Optical Fiber Launch CableSC/APC-SC/APC stands for connector OS2 stands for single mode Testing, Inspection and Positioning: How to Use Fiber Extension Cords to Generate Baseline Traces: 1. Use the OTDR optical fiber extension cable as the launching cable: Connect the OTDR optical fiber extension cable between the OTDR and the optical fiber line under test. This will enable you to measure the loss of the near-end connection. 2. Use the OTDR optical fiber extension cord as a receiving optical cable: Connect the optical fiber extension cord to the remote connection of the optical fiber line under test. This will allow you to measure the loss of the remote connection. 3. By using the optical fiber extension cable as the transmitting and receiving optical cable, you can easily measure the total insertion loss of the optical fiber line under test.. Package List: 1 x OTDR Optical Fiber Launch Cable