Features Fiber Fault Detection: Efficiently detects fiber faults in multimode and single mode fibers. Multiple Power Supply Options: Compatible with alkaline batteries, power banks, computers, adapters, and can batteries. Illumination Function: Facilitates line inspection and construction in dark environments. Ergonomic Design: Lightweight and comfortable to use, ensuring ease of handling. Wide Usage: Indispensable tool in fiber engineering construction, network maintenance, and optical component production and research. Specification: Item Type: Visual Fault Locator Material: ABS Test Distance: 30KM Working Current: ≤170mA Battery Life: >5h Gear Output: 3 adjustable gears Output Wavelength: 650nm Interface Type: 2.5mm universal adapter Power Type: AAA battery x 2 (shipped without battery) Storage Temperature: -40℃ to +85℃ Working Temperature: -20℃ to +60℃ (without condensation) Package List:1 x Visual Fault Locator1 x Ceramic Sleeve1 x User Manual Package List 1 x Visual Fault Locator 1 x Ceramic Sleeve 1 x User Manual