Fluke Networks PTNX1 Pocket Toner NX1 Coax Cable Tester Pocket-sized toner identifies and tests singular coaxial cable that has F-type connectors to detect continuity, short circuits, and open circuits Removable coupler on the tone generator cap allows for testing male and female connectors Tests live cabling and is protected up to 52V Buzzers in both the probe and detachable tone generator indicate continuity Dual-colored LED display shows green for continuity, red for shorts, and remains clear for opens