Welcome to the store! [High Efficiency] Easily identify fiber breakpoints, bad connections, bending, or cracks. Excellent for finding the right fiber to splice or quickly locating a break. Our 30mW visual fault locator emits a 650nm strong red light for fiber tracing, fiber routing, and continuity checking effectively. Breaks or faults in the fiber will break the light and create a bright glow around the faulty area. [Excellent Features] The fiber optic tester is perfect for field testing due to its many features such as constant output power, multi-interface adaptation, low battery warning, long battery life, and long-distance detection. Super strong and uses practical AA batteries. [Widely Used] 2.5mm Universal Connector - The detector's connector is compatibly designed for ST, SC, LC connectors in both circular and square shapes of various fiber optic cables. [Long Output Distance] The 30mW visual fault locator has a strong light source output power, can output a strong red indicator light, up to 20-30 kilometers. The high-efficiency power supply circuit ensures stable power supply. [Crash-proof and Dust-proof Design for Pen Head] It is designed with a stainless steel head and aluminum body to prevent crashes and dust, and the casing's ground design effectively prevents ESD damage. Batteries: Two 1.5V batteries (not included) Type: A Color: Green + Black Material: Aluminum Alloy Package Contents: 1 set x Fiber Identifier Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture to be slightly different from the real thing. The allowed measurement error is +/- 1-3 cm. Your satisfaction is our top priority. We will provide you with the best service. If you find any problems after receiving the product, such as damage, incorrect quantity, etc., please contact us immediately and we will provide you with the best solution!