Welcome to our store! Smart Testing: This visual fault locator can test optical fiber breakage and bending, as well as achieve end-to-end fiber identification. Wide Application: Enables broad application in telecommunications, CATV engineering and maintenance, integrated cabling construction, etc. Reliable Work: Non-contact connection ensures no damage, and the output power is unlikely to be affected by voltage fluctuations. Easier Operation: Simple operation along with a 10km output distance greatly simplifies testing and significantly improves work efficiency. Easy to Carry: Powered by 2 AA batteries (not included), this lightweight and compact red light pen is easy to carry and store. Item Type: Visual Fault Locator Model: HT-10 Material: Aluminum Universal Interface: Approx. 2.5mm / 0.1in, FC, SC, ST. Output Wavelength: 650nm ± 10nm Output Optical Power: > 10MW Optical Fiber Adapter: Universal Connector. Output Distance: Approx. 10km / 32808.4ft Operating Temperature: 0 ~ +60℃ Storage Temperature: -20 ~ +70℃ Battery Type: 2 x 1.5vAA battery, delivered without battery. 1 x Visual Fault Locator 1 x Pen Case 1 x Lanyard 1 x User Manual Satisfaction Guarantee: Customers are our top priority. If you find any problem with the product, please contact the seller immediately. We strive to provide satisfactory customer service.