1、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. 2、PORTABLE DESIGN: The fiber optic fault locator adopts ergonomic design, making it comfortable to hold, lightweight and portable, convenient to use anytime and anywhere. 3、POWER SUPPLY: Supports multiple power supply methods such as alkaline battery, power bank, computer, and adapter, which is convenient and practical. 4、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. 5、APPLICABLE FIELDS: This portable fiber detector is widely used in fiber engineering construction, fiber optic network maintenance, optical device production and research, etc.