Features: This RJ45/RJ11 cable port networking cable tester accurately measures resistance and quickly identifies line faults, ensuring stable networking connection. Ideal for IT professional and home users needing frequent networking troubleshooting. Supports multiple interfaces types including RJ45 and RJ11, meeting various device connection needs. Perfect for both home networking wiring and enterprises levels networking maintenance. Compact and easy to carry, allowing quick testing. Especially suitable for technicians who work on the go. Features indicators lights and buttons, making it easy for none professional to operate. Great for home users solving minors networking issues independently. The ABS materials offer excellent impacts resistance and extends product life, making it a reliably long term tool for engineers and support personnel. Specifications: Component: ABS Size:Approx.12.1x10cm/4.76x3.94inch Package Includes: 1Pcs networking Cable Tester note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you donot mind before you order. 2.Due to the differences between different monitors, the picture may not reflect the actual color. Thanks for your understandings.