Aiposen Network LAN Cable Tester Test Tool LED Light RJ45 RJ11 RJ12 CAT5 CAT6 UTP Used for testing RJ45 cables, RJ11 telephone cables and network cables Small and easy carried with smooth lines which is designed drop prevented and portable hand-held Easily switch between slow automatic grade and manual grade Easy read LED display which indicates problems Keep your network running smoothly by testing wrong connection, short circuit and open circuit