Visual Fault Locator, RISEPRO Red Light Pen 10mV Fiber Optic Cable Tester Test Equipment VFL-10mW EASY IDENTIFICATION OF FIBER BREAKPOINTS, POOR CONNECTIONS, BENDING OR CRACKING  The RISEPRO&reg; 10mW Visual Fault Locator Emit a 650nm Bright Red Light For Fiber Tracing, Fiber Routing And Continuity Checking Efficiently, Breaks Or Faults In The Fiber Will Refract The Light, Creating A Bright Glow Around The Faulty Area WIDELY USED ON FC, SC, ST GENERAL FIBER INTERFACE  This Visual Fault Locator Built With 2.5mm Universal Connector For Testing Different ST, SC, FC Interferes Fiber Optic Cables CRASH-PROOF AND DUST-PROOF DESIGN FOR PEN HEAD  It Is Designed With Stainless Steel Head To Prevent Crash And Dust, And The Case Ground Design Prevents ESD Damage Efficiently. OPERATES EITHER IN CW OR PULSED  This Visual Fault Locator Can Operates Either In CW Or Pulsed Mode RED LIGHT OUTPUT DISTANCE 8-10KM  This 1mW Visual Fault Locator With Battery Output Strong Red Light Goes 8-12 Kilomters Far, High Effective Power Circuits Allows For Stable Power, Pen-type Design With Pouch Make It Portable.