Feature: 1. 3.5IN SCREEN: The optical power meter has a touchable color display, easy to operate, clear display and very practical. 2. OTDR TESTER: Optical power meters are used to evaluate FTTx and access network construction and maintenance, identify fiber breaks, measure optical cable lengths, and calculate relative optical power losses. 3. SIX FUNCTIONS: This tester can be used as an optical time domain reflectometer, optical power meter, stable light source, visual fault location, LED light, and event map. 4. ABS HOUSING: The ABS housing of the reflectometer can be better dustproof and waterproof, lightweight and wear resistant, and has a long service life. 5. COMPACT AND PORTABLE: This tester is convenient and compact, easy to travel with, so that the test at any time to use. Specification: Item Type: Optical Time Domain Reflectometer Material: ABS Connector Type: SC, UPC Stable Light Source: 1550nm OTDR: 0-80km Optical Power Meter: 8 kinds of wavelengths 850, 980, 1300, 1310, 1490, 1550, 1625, 1650 Red Light: 10mw Dustproof Interface: SC interface for OTDR, 2.5mm interface for OP or PFL Display: 3.5in touch screen display Power Supply: Built in 3.7V 2200mah polymer battery (built in) Six Functions: Optical time domain reflectometer, optical power meter, stable light source, visual fault location, LED light, event map. Package List: 1 x Optical Time Domain Reflectometer1 x Instruction1 x Charging Head1 x Charging Cable1 x Disc1 x Storage Bag