... 4.Standard AAA alkaline batteries Visual fault locator, fiber optic visual fault locator, optical fiber visual fault locator3C-VFL-002 The Pocket ... every fiber technician. Specification Model3C-VFL-001 Pen type visual fault locatorEmitterLDwavelength635±10nm/635nmOutput power1MW,3MW,5MW,10MW,15MWTransmission ... *25Working hours10mw continuous work≥20h Steel fiber optic visual fault locator