• Universal tester for RJ45 network cables and RJ11/RJ12 telephone lines. • Detects faults such as open circuits, short circuits, and incorrect connections. • Detachable design with main and secondary units for long-distance testing. • Impact-resistant ABS material housing with CE certification for increased durability. • LED indicators with fast and slow verification modes to check cable status. • Compact and portable design ideal for carrying at any time. • Works with a 9V battery (not included).