Feature 15 in 1 Design: Can be used as optical time domain reflectometer, optical power meter, stable light source, red light fault location and LED light. 2Simple Operation: Equipped with 3.5in display touchscreen, the optical time domain reflectometer OTDR is very simple to operation for testing and measurement. 3Smart Testing: Used to evaluate FTTx and access network construction and maintenance, identify fiber optic break points, measure fiber optic cable length, and calculate relative optical power loss. 4Wide in Range: OTDR optical time domain reflectometer can measure a wide range of fiber optic networks, including long distance fiber optic networks and distributed fiber optic sensing networks. 5Easy Carrying: Comes with a compact size and a light weight as well, the OTDR is very convenient to carry for both indoor and outdoor use.Item Type: Optical Time Domain ReflectometerModel: AUA-18UPort: UPCMaterial: ABSStable Light Source Connector: SC PCOptical Power Meter Connector: SC FC STStable Light Source: 1550nmOTDR: 0-60kmOptical Power Meter: 7 wavelengths of 850, 1300, 1310, 1490, 1550, 1625 and 1650. Lighting: LED LightDust Proof Interface: SC interface for OTDR, 2.5mm interface for OPM PFL. Display: 3.5in touchscreen display. Power Supply: Built in 3.7V 2200mah polymer lithium battery. Five Functions: Optical time domain reflectometer, optical power meter, stable light source, red light fault location, LED light. .wang-edit-text{ font-family:'Arial' !important; } .wang-edit-text table { border-top: 1px solid #000; border-left: 1px solid #000; } .wang-edit-text table td, .wang-edit-text table th { border-bottom: 1px solid #000; border-right: 1px solid #000; padding: 3px 5px; } .wang-edit-text table th { text-align: center; }Package List1 x Optical Time Domain Reflectometer1 x User Manual1 x Plug1 x USB Cable1 x Disc1 x Storage Box