Ethernet cables aren't just for data anymore... Power-over-Ethernet (PoE) sends up to 48 volts of power through CAT5/6 patch cables. Test cables for PoE voltage with the Power Panel and the Tone Star before you connect network devices. The Power Panel tester reports any discovery voltage and can test a PoE injector for full power. It also gives you information about what type of devices are connected, speed of data connections, and Ethernet pair wiring. This inline version of the Power Panel also gathers additional information when it is connected in between 2 network devices. Instead of just seeing individual device speeds, it shows see what the negotiated data rate. If PoE is involved, the inline Power Panel passes through the power to the PoE device so it is on while being monitored. It also can display the power consumed by the PoE device (in watts). This kit also includes the Tone Star tracer that detects both generated tones and 60Hz AC waveforms. It includes a bright white LED for poking around in dark places and a variable-volume speaker. Kit includes nylon case, RJ-45 to coax adapter, and RJ-12/aligator clip adapter and 2 9V batteries.