POCKET RINGER TONER CT-LTLED-2 FOR CABLE & SATELLITE APLICATIONS 1 AAA BATTERY Perfect for testing and tracking down Coax cables for Satellite, OTA, Cable. A excellent tool for installers or for the home owner or hobbyist! LED light indicates DC shorts, splitters and other self-grounding devices in cable An audio tone identifies line carrying signal Save time and money on your install projects