Feature:1. Smart Testing: The visual fault locator can test optical fibre breakage and bending as well as achieving end to end fibre identification.2. Broad Utility: Allows for broad application on telecommunication, CATV engineering and maintenance, integrated wiring construction, etc.3. Reliable Work: Non contact connection guarantees no damage, and the output power is not likely to be affected by the voltage fluctuations.4. Simpler Using: Simple operation together with 10km output distance largely simplifies the testing and greatly improves working efficiency.5. Easy Carrying: Powered by 2pcs AA battery, which are not included, the lightweight and compact red light pen is simple to carry and store.Specification:Item Type: Visual Fault LocatorModel: HT-10Material: AluminumUniversal Interface: Approx. 2.5mm / 0.1in, FC, SC, ST Output Wavelength: 650nm 10nmOutput Optical Power: > 10MWOptical Fiber Adapter: Universal connector. Output Distance: Approx. 10km / 32808.4ftOperating Temperature: 0 ~ +60Storage Temperature: -20 ~ +70Battery Type: 2 x 1.5vAA battery, shipped without battery. .Package List:1 xVisual Fault Locator1 x Pen Bag1 x Lanyard1 x User Manual