Item Type: Visual Fault Locator_x000D_ Material: ABS_x000D_ Test Distance: 30KM_x000D_ Working Current: 170mA_x000D_ Battery Life: >5h_x000D_ Gear Output: 3 adjustable gears_x000D_ Output Wavelength: 650nm_x000D_ Interface Type: 2.5mm universal adapter_x000D_ Power Type: AAA battery x 2 (shipped without battery)_x000D_ Storage Temperature: -40 to +85_x000D_ Working Temperature: -20 to +60 (without condensation) 1[Fiber Fault Detection] Driven by a constant current source, this visual fault locator efficiently detects fiber faults by entering multimode and single mode fibers when connected to the optical interface. 2[Multiple Power Supply Options] Support various power supply methods such as alkaline batteries, power banks, computers, adapters, and can batteries. 3[Illumination Function] This fiber visual fault tester facilitates line inspection and construction in dark environments such as outdoor settings, data centers, and night time operations. 4[Ergonomic Design] This visual fault locator is lightweight, ergonomic designed, comfortable to use, user friendly, ensuring ease of handling. 5[Wide Usage] This is an indispensable tool in fiber engineering construction, fiber network maintenance, and optical component production and research. 1 x Visual Fault Locator 1 x Ceramic Sleeve 1 x User Manual