【Easy to Check Fiber Faults】Effortlessly and accurately detect and locate fiber breaks, poor connections, bends, or cracks. 【Usage】The locator 's 2.5mm universal connector is designed to be compatible with ST, SC, and FC interfaces, making it suitable for testing both single-mode and multi-mode cables.(The LC cable can be tested through the FC Male to Female LC connector.) 【Practical Design and Exceptional Performance】With its compact and lightweight design, this device is highly portable and ideal for field tests. It incorporates various functions such as constant output power, low battery warning, long battery life, and long-distance detection. 【Components】Includes 5 Adapters - FC, ST, LC, SC couplers ( female to female) and FC male to LC female adapter; 3 short Patch Cords (3.2 FT Long) - ST to SC, ST to LC and ST to FC patch cord. These components facilitate the troubleshooting of fiber optic cables connected to distribution panels without the need to remove the fiber from the panel.[Note: Not include 2AA batteries] 【Quality assurance】24 months after-sales service gives you a good shopping experience. If you have any problem, please contact us, we will solve it for you and make you reap satisfaction. fyboptwu - Fiber Optic Cable Troubleshoot Kit - 1pc Visual Fault Locator & FC to LC Adapter & 1pc LC, SC, ST, FC Coupler & 3 Short Patch Cords (Mode Number: VFL-10)