Feature: 1. Different interfaces can be replaced to meet different needs and apply to more tests. 2. Nine functions, OTDR, event mapping, optical power meter, visual fault locator, stable light source, Ethernet cable distance, Ethernet Cable Tracer , RJ45 Ethernet cable sequence, LED lights. 3. UPC interface, dual‑wavelength switching is more convenient, and the measurement data is more convenient and accurate. 4. Lightweight body, portable and easy to operate, making fiber testing easier. 5. Through the OTDR function, it can accurately measure the loss distribution and splice quality of optical fibers and cables. Specification: Item Type: OTDR Optical Fiber Tester Model: AUA-900D Material: ABS Battery: NOVKER-400 3.7V 4000mAh Rechargeable Lithium Battery (Battery Included) Adapter: US Standard 110-240V Purpose: Optical Fiber Communication Interface: UPC Wavelength: 1310/1550nm Functions: OTDR, Event Mapping, Optical Power Meter, Visual Fault Locator, Stable Light Source, Ethernet Cable Distance, Ethernet Cable Tracer, RJ45 Ethernet Cable Sequence, LED Lights. . Package List: 1 x OTDR Fiber Tester1 x Adapter1 x USB Data Cable1 x Power Adapter1 x CD1 x Shoulder Strap10 x Clean Cotton1 x Carrying Case1 x Manual Note: Please follow the instructions for specific usage.