UT681L Cable TesterMain Features1. Tests Ethernet cables and telephone lines2. Equipped with RJ45 interface for Ethernet cable and RJ11 interface for telephone line testing3. Ethernet cables: Shielded/Unshielded test4. Visible LED indication5. Automatically check circuit breakage, short circuit and cross circuit6. Can toggle between fast and slow speed test modes7. Single key operation8. Manual/auto power off (after 10-minute inactivity)9. Low battery indication10. Power supplied by 9V layer-built battery