Features • Efficient Fiber Fault Detection - This tool utilizes a constant current source for accurate detection of fiber faults in both multimode and single mode fibers • Versatile Power Supply Options - Compatible with alkaline batteries, power banks, computers, adapters, and can batteries for flexible usage in various situations • Built-In Illumination Function - The integrated light feature enhances visibility during inspections in dark environments, perfect for outdoor settings and data centers • Ergonomic Lightweight Design - Crafted for comfort, this fiber light test pen ensures ease of handling, reducing user fatigue during prolonged use • Essential for Multiple Applications - Ideal for fiber engineering construction, network maintenance, and optical component research, making it a must-have tool for professionals Features: 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 s. 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. 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 Locator 1 x Ceramic Sleeve 1 x User Manual Package List 1 x Visual Fault Locator 1 x Ceramic Sleeve 1 x User Manual