Features WORKING PRINCIPLE --- Driven by constant current source, connected to the optical interface to enter the multi mode and single mode fiber to realize the fiber fault detection. PORTABLE DESIGN --- The fiber optic fault locator adopts ergonomic design, making it comfortable to hold, lightweight and portable, convenient to use anytime and anywhere. POWER SUPPLY --- Supports multiple power supply methods such as alkaline battery, power bank, computer, and adapter, which is convenient and practical. LIGHTING FUNCTION --- The fiber fault detector has lighting function, convenient to check the line and construct in the field, machine room, night and other dark environment. APPLICABLE FIELDS --- This portable fiber detector is widely used in fiber engineering construction, fiber optic network maintenance, optical device production and research, etc. Specification: Item Type: Fiber Fault Locator Test Distance: 20KM Working Current: ≤160mA Battery Life: >5h Gear Output: 3 Gears Adjustment Output Wavelength: 650nm Interface Type: 2.5mm Universal Adapter Power Supply: 2 x AAA Battery (battery not included) Storage Temperature: -40-85℃ Working Temperature: -20-60℃ (no condensation) Package List:1 x Fiber Fault Locator 1 x Ceramic Sleeve1 x User Manual Package List 1 x Fiber Fault Locator 1 x Ceramic Sleeve 1 x User Manual