Feature: 1. MAIN FUNCTIONS: Optical time domain reflectometer, 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. 2. 6 FUNCTIONS: Optical time domain reflectometer is also an optical power meter, with stable light source, visual fault location, LED light, and event map. 3. CONVENIENT AND COMPACT: Compact size and being lightweight as well, convenient to carry to different scenes to use. 4. 3.5 IN COLOR TOUCHSCREEN: OTDR supports multi touch, smoothly operation, soft light screen, adjustable screen brightness. 5. BASIC INFORMATION: OTDR has a measurement range from 0 to 80km, and the infrared light can arrive 10km, check the details for better user experience! Specification: Item Type: OTDR Fiber Optic Tester Mode: AUA 16U Material: ABS Connector Model: SC, UPC Stable Light Source: 1550nm OTDR: Approx. 0 to 80000m / 0 to 262467.2ft Optical Power Meter: 8 wavelengths 850, 980, 1300, 1310, 1490, 1550, 1625, 1650 Red Light: Approx. 10000m / 32808.4ft LED Lighting: Dust Proof Interface: SC interface for OTDR, 2.5mm interface for OPM PFL Display: 3.5 inch touchscreen display screen Power Supply: Built in 3.7V, 2200mah polymer battery (shipped with built in battery) Voltage: 100-240v Six Functions: Optical time domain reflectometer, optical power meter, stable light source, visual fault location, LED light, event map . Package List: 1 x OTDR Fiber Optic Tester 1 x Manual 1 x Charging Head 1 x Charging Cable 1 x Disc 1 x Storage Bag 1 x FC LC Adapter