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, the lightweight and compact red light pen is very convenient to carry and store. Specification: Item Type: Visual Fault Locator Material: Aluminium Alloy Output Optical Power: >10MW Output Distance: Approx. 10000m / 32808.4ft Output Wavelength: 650±10nm Optical Adapter: Universal Connector Operating Temperature: 0-+60℃ Storage Temperature: -20-+70℃ Battery Type: 2 x 1.5v AA (delivered without battery). Package List: 1 x Visual Fault Locator1 x Pen Bag1 x Lanyard1 x Ceramic Core1 x User Manual Note: 1. Do not look directly at the laser light when using it to avoid damage to the eyes.2. When not in use, please take out the battery, so as not to cause battery leakage and cause the aluminium parts to oxidise and not conduct electricity.