Features: The ET638 Internet Cable Tester is a versatile tool that integrates cable tracking, optical power measurement, visual fault Locators, and cable length measurement, making it essential device for precise Internet diagnostics. designs with high Precisions and user friendly operation, this tester features a 3.2inch screen and supports RJ45 & BNC , ensuring comprehensive testing capabilities. Ideal for Internet engineers, communication technicians, and IT maintenance personnel, the ET638 provide reliable Performances in various telecommunication Internet environment. Perfectly suited for data centers, office cabling, home Internet installations, and troubleshooting tasks, this multifunctional tester ensures efficient and accurate Internet assessments. With its robusts ABS construction, the ET638 not only withstands rigorous use but also enhances productivity by simplifying complex Internet testing processes, making it a valuable addition to any professional toolkit. Specifications: Material: ABS Size: about 22x28cm/8.66x11.02inch Measuring ranges: 5m to 500m(16ft to 1968ft) Package Includes: 1 set Internet Cable Tester note: Please allow 1 to 3cm error due to manual measurement, please make sure you do not mind before you bid, Due to the differences between different monitors, the picture may not reflect the actual colorful of the item.