Visual Fault Locator 30Km, Vfl Fiber Optic Tester Kit Include Single Mode Specification: What's in the box: Features Attribute: 2.Metal matte paint design 3.Widely Used 4.Practical design, excellent function Tips 1. Easy to Check Fiber Faults - This visual fault locator can accurately detect and locate fiber breaks, poor connections, bending, or cracking. The detector will emit a 650nm bright light for fiber tracing, breaks or faults in the fiber will refract the light. 2. Excellent Function - This VFL device is portable and easy for a field test with multiple functions such as constant output power, lower battery warning, long battery life, and long-distance detection. 3. WIDELY USED - 2.5mm Universal Connector - the connector of the detector is compatibly designed for ST, SC, FC interferes both in circle and square shape of different fiber optic cables. 4. LONG OUTPUT DISTANCE - This visual fault locator with battery output strong light goes 20-30 kilometers far, high effective power circuits allows for stable power. 5. Practical Design - Small size and lightweight, pen-type design with pouch make it portable, easy to check fiber faults with visual fault locator, design with a stainless steel head and aluminum body to prevent crash and dust, the case ground design prevents ESD damage efficiently.