... fiber failures by visible light in very sharp speed. With strong penetrating laser, leakage points can be get clearly ... endfaceConstant power control, no power fluctuates when voltage varies with low voltage alarming functionBoth continue output and modulate output2.5mm ... FC, SC, E2000, ST etc650nm high LD PowerCompact structure with AA Two cellsInstructionButtons of Switch,Dust cap, Led Indicator ...