The Networks 262003AL PRO3000 Tone generator Alligator Clips and RJ11 Plug is your best choice for toning and tracing wire on non-active networks, and specifically for identifying individual pairs with SmartTone technology. You can send this loud tone up to 10 miles (16 kilometers) on most cables. Attach the nylon pouch to your belt, and you will be equipped for any wire identification job.