uxcell RJ11 RJ45 BNC Wire Tracker Network Cable Tester Telephone Line Finder Wire Tracer and Tone Generator with Earphone Battery HUNT. Sensitive signal searching system ensures a quick and accurate wire track from messy cables. Never get annoyed in the world of chaotic lines. COVERAGE. Jacks: RJ11, RJ45, BNC. Corresponding to Telephone Line, Internet Line, TV Cable. This tracer could cover most needs in life, and an alligator adaptor would be attached to make it a Multi-Tool. ANALYSIS. Testing the correctness of twisted pair cables, if something went wrong, the device could identify open circuit, shorted, reversed or miswired. DETECTION. Judging the status of a telephone line (IDLE, RING or Off-Hook), and checking the TIP-RING line. A reliable partner for helping DIY telephone lines in the house. CONVENIENCE. Cozy shape and size, Spotlight, Earphone, Storage bag, all of these are our devotion to a better practical tool. No sounds The volume is weak Too short for working distance.