Goldtool Visible Fault Locator 20Mw-Pen Shape ,Can reach up to 20km, Locates Breakpoints And Poor Connections, Used For End-To-End Visual Fibre Identification, Special Laser End Design To Avoid Damage, Use 2.5mm Universal Adapter, Can Match SC/LC Adapters. Requires 2x AA Alkaline Batteries For Operating Up To 60 Hours Continuously, Retail Box, 1 Year Warranty