Welcome to our store! 1. Ergonomic Design: Aluminum alloy body with a non-slip handle for a comfortable grip. Ergonomic design, compact and portable, easy to hold with one hand. Replaceable ceramic liner for more convenient use. 2. Three Interfaces: Supports three interfaces to meet different needs, with a standard 2.5mm universal connector, compatible with FC, SC, and ST interfaces. 3. Open-Type Pen Tip: Our test pen comes with a protective cap and an open-type pen tip to prevent damage from dust. 4. Integrated Chip: This test pen uses a powerful light source integrated chip that combines power management, signal modulation, and switching control. 5. Stable Performance: This tester offers very stable performance with a consistent output, enhancing user efficiency. Item Type: Fiber Optic Visual Fault Locator Material: Aluminum Alloy Output Wavelength: 650nm±10nm Batteries: 2 x AA batteries (batteries not included) 1 x Fiber Optic Visual Fault Locator (Batteries not included) 1 x Lanyard 1 x Storage Bag 1 x User Manual Satisfaction Guarantee: Customer satisfaction is our top priority. If you encounter any product issues, please contact the seller immediately. We strive to provide satisfactory customer service.