Tester designed for testing cables such as: UTP, FTP, STP and telephone cables RJ12, RJ11. 9 controls (LEDs) indicate the correctness of the connection. Power supply: 9V battery (not included) Ports: RJ45 and RJ12 Auto scan function with 2 speeds: ON - normal and S - slow. It tests each vein separately. It has a switch that turns on the power to extend the battery life. Types of tests performed: - cable break (break), - short circuit, - inverted pairs, - crossed pairs