The RJ45 & RJ11 Network Cable Tester is a compact and easy-to-use device designed to quickly check the continuity and wiring of Ethernet (RJ45) and telephone (RJ11) cables. It helps identify common cable faults such as open circuits, short circuits, crossed wires, and incorrect pin connections, making it ideal for network installation, maintenance, and troubleshooting. Lightweight and portable, it is suitable for both professional technicians and DIY users.