Feature: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.Specification:Item Type: Visual Fault LocatorMaterial: ABSTest Distance: 30KMWorking Current: 170mABattery Life: >5hGear Output: 3 adjustable gearsOutput Wavelength: 650nmInterface Type: 2.5mm universal adapterPower Type: AAA battery x 2 (shipped without battery)Storage Temperature: -40 to +85Working Temperature: -20 to +60 (without condensation).Package List:1 x Visual Fault Locator1 x Ceramic Sleeve1 x User Manual