Pen Visual fault locator Visual fault locator is also called light pen, pen type red light source, visible light detection pen.

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1. Convenient for use and carry Dust-proof design keeps fiber connectors clean. 2. Compact in size, light in weight, red laser output, both SM and MM available. 3. Operates either in CW or Pulsed. 4. Constant output power. 5. Lower Battery warning 6. Long battery life(up to 60 hours) Visual fault locator finds the fiber faults of OTDR (Fiber fracture and bending fault location).