Fiber Instrument Sales introduces it’s Duplex LC Visual Fault Locator. Because LC connectors are commonly clipped together this product eliminates the common mistake that is made of crossing Tx and Rx patchcords to active equipment. This unit allows the user to toggle between the “A” and “B” sources to ensure that everything is properly connected. Unit comes with: Carrying pouch, 9V Battery, User Manual, One Year Warranty.