Features: Brand new and high quality 1-5KM Long inspection distance; Operating mode: CW and Glint ; Steady power ; Stable and durable shell Pen pattern design, convenient to use and carry Features: Locate the fiber fault, such as break and bend; Fault inspection in Otdr blind zone; Fiber recognition from for head face to end face; Mechanical transition point optimization Application for Telecom, CATV project; Pds construction and maintenance; Optical component manufacturing and research; other fiber project. Specifications: Wavelength: 650 nm Power: 1mw Connection: universal 2.5 mm connector (the available interface SC/for FC/ST) FC-LC fiber adapter : The available interface LC Frequency: 1Hz Power: AA 1.5V (Product does not include battery) Range: 1-5 km Size: about 17.5x2.6cm/6.89x1.02in Note: Please allow 1-2cm error due to manual measurement, make sure you do not mind before you order. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Test pen used for a period of time, if the light is weak, may be a ceramic tube normal wear or broken, can be written to replace unscrew the ceramic tube. Package Includes: 1x visual fault locator 1x FC-LC Fiber Adapter 1x Visual Fault Locator Bag 1x Lanyard