Features 1、MAIN USE: Pen type visual fault detector is specifically designed and maintained for locating defects in optical cables and circuits, visually searching for fiber breakage. 2、IDEAL HELPER: Small size, light weight, energy saving, and stable output power, a good tool for fiber optic testing. 3、NON CONTACT DETECTION: Non contact connection, non destructive fiber optic and transmitter end face, output power not affected by voltage fluctuations. 4、ALUMINUM ALLOY MATERIAL: Made of premium aluminum alloy material, this fiber fault locator is strong yet lightweight, has a fast heat dissipation for long term stable use. 5、EASY TO USE: Simple operation together with 30km test range distance largely simplifies the testing and greatly improves working efficiency. Specification Item Type: Visual Fault Locator Material: Aluminum Alloy Fiber Optic Adapter: Universal connector Output Distance: Approx. 30000m / 98425.2ft Output Wavelength: 650 ± 10nm Operating Temperature: 0 to +60 ℃ Storage Temperature: -20 to +70 ℃ Battery Type: Requires AA battery x 2 (shipped without battery) Package List 1 x Red Light Pen 1 x Manual 1 x Ceramic Core 1 x Adapter 1 x Red Light Pencil Case 1 x Lanyard