Feature 1SAFETY USE: The fiber optic tester adopts nanotechnology, with multiple electrostatic protection and a light port protection device, safe to use. 2HIGH PERFORMANCE CHIP: The fiber optic pen adopts highly integrated chip that integrates power management, signal modulation and switch control. 3STRONG LIGHT: The fiber optic visual fault locator has strong red lighting, which could easily penetrate long distance optical fibers. 4ALUMINUM ALLOY BODY: The fiber optic cable tester adopts high strength aluminum alloy body, hard wearing and falling resistant. 5COMPACT SIZE: The visual fault locator is compact in size, can be easily placed in your pocket for easy carrying.Item Type: Visual Fault LocatorMaterial: Aluminum alloyBattery: 1.5V AA Battery x 2 (Not Included)Use: Fiber oPtic Communication DetectionBasic Parameter:Working Wavelength: 630nm to 670nm .wang-edit-text{ font-family:'Arial' !important; } .wang-edit-text table { border-top: 1px solid #000; border-left: 1px solid #000; } .wang-edit-text table td, .wang-edit-text table th { border-bottom: 1px solid #000; border-right: 1px solid #000; padding: 3px 5px; } .wang-edit-text table th { text-align: center; }Package List1 x Visual Fault Locator1 x User Manual1 x Portable Bag1 x Lanyard