Features 1、SAFETY USE: The fiber optic tester adopts nanotechnology, with multiple electrostatic protection and a light port protection device, safe to use. 2、HIGH PERFORMANCE CHIP: The fiber optic pen adopts highly integrated chip that integrates power management, signal modulation and switch control. 3、STRONG LIGHT: The fiber optic visual fault locator has strong red lighting, which could easily penetrate long distance optical fibers. 4、ALUMINUM ALLOY BODY: The fiber optic cable tester adopts high strength aluminum alloy body, hard wearing and falling resistant. 5、COMPACT SIZE: The visual fault locator is compact in size, can be easily placed in your pocket for easy carrying. Specification Item Type: Visual Fault Locator Material: Aluminum alloy Battery: 1.5V AA Battery x 2 (Not Included) Use: Fiber oPtic Communication Detection Basic Parameter: Working Wavelength: 630nm to 670nm Package List 1 x Visual Fault Locator 1 x User Manual 1 x Portable Bag 1 x Lanyard