Features 1、Strong Red Light: The strong red light enables easy penetration and long testing distance, which also has good stability for efficient work. 2、Simple Operation: Highly integrated chip that integrates power management, signal modulation, and switch control for convenient operation. 3、Higher in Safety: Designed to have anti static protection, the visual fault locator has optical port protection device for working safety. 4、Premium Aluminum: Adopting premium aluminum alloy material, the VFL red light pen is very durable with falling, collision, and long using. 5、Convenient Carry: Comes with a compact size and a light weight as well, the fiber optic cable tester is very easy to carry for outdoor. Specification Item Type: Visual Fault Locator Material: Aluminum alloy Battery: 2 x 1.5V AA battery, without battery. Use: For communication fiber optic detection. Working Wavelength: 630nm~670nm Package List 1 x Visual Fault Locator 1 x User Manual 1 x Carrying Bag 1 x Lanyard