Feature: 1. FLIP PEN HAT: Visual fault locator is designed with a flip pen hat. Simply press the side button to open the flip hat, making the operation more convenient. 2. SMALL SIZE AND PORTABLE: Visual fault locator takes up no space and is convenient for travel. Not only does it have exterior features, but it also gives you a new experience. 3. EASY TO USE: Supports FC, SC, ST, LC common interfaces, detachable metal pen heads, making it easy to replace ceramic cores. Longer penetration distance, stable performance, and long service life. 4. APPLICABLE SCENARIOS: Driven by a constant current source and connected to an optical interface, the fiber tester enters multimode and single mode optical fibers to achieve fiber fault detection function. An indispensable tool for fiber engineering construction, fiber network maintenance, and optical device production and research. 5. ABS SHELL: Well crafted in premium ABS material, this visual fault locator is wear resistant and scratch resistant, ensures a long service life. Specification: Item Type: Visual Fault Locator Material: ABS Output Distance: Approx. 5000m / 16404.2ft Wavelength: 650NM Fiber Optic Connector: Universal 2.5MM connector Working Temperature: -20 ℃ to +60 ℃ (without condensation) Battery Type: AAA battery x 2 [shipped without battery]. Package List: 1 x Visual Fault Locator1 x Portable Rope 1 x Manual 1 x Ceramic Sleeve