Feature: 1. ACCURATE IDENTIFICATION: This VFL pen will emit 650nm red light, can easily and accurately detect and locate fiber breakage, poor connection, bending or rupture. Can operate in continuous wave or pulse mode. 2. LONG DISTANCE: The visual fault locator has a strong light source output power of 15mW, the strong red light easily penetrates maximum 15km in the optical cable. 3. UNIVERSAL CONNECTOR: Designed with a universal 2.5mm connector for ST, SC, and FC, which can interfere in the circular and square shapes of different optical cables and can be used for single and multi mode cables. 4. LED LIGHT: Equipped with LED flashlight, with high brightness, easy to cope with dim environment for efficient working. 5. RELIABLE MATERIAL: The stainless steel head and aluminum body design can prevent collisions and dust, and the shell grounding design can effectively prevent ESD damage. Specification: Item Type: Fiber Visual Fault Locator Material: Aluminum Alloy Model: B5 15 Fiber Optic Adapter: Universal Connector Output Fiber Power: 15mW Output Wavelength: 650nm Interface: 2.5mm Universal Effective Distance: 15km Operating Temperature: -20℃ to +60℃ Storage Temperature: -40℃ to +85℃ Power Supply Battery Type: 1 x 18650 Lithium Ion Battery 1800mAh (Built in). Package List: 1 x Fiber Visual Fault Locator1 x Instructions1 x Ceramic Core1 x Charging Cable1 x Lanyard