【Easy to Check Fiber Faults】Effortlessly and accurately detect and locate fiber breaks, poor connections, bends, or cracks. 【Fiber Cleaner】The white pen is suitable for cleaning Φ 2.5mm SC/ST/FC connectors. The purple cleaner is suitable for cleaning Φ 1.25 mm LC/MU connectors. Extendable tip up to 8.46 inches to meet your needs of cleaning recessed connectors. The fiber cleaner box is suitable for cleaning LC/SC/FC/ST/MU/MTP/MPO/D4/DIN connectors. 【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. 【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] FYBOPTWU - Fiber Optic Cable Troubleshoot Kit - Visual Fault Locator & 2pcs Fiber Cleaners Pens & 1pc FC to LC Adapter & 1pc LC, SC, ST, FC Coupler & 3 Short Patch Cords (Mode Number: VFL-50)