The Triplett TVR1G 10/100/1000/1000 Mb/s LAN Network Tester has been designed to test LAN devices and cabling to the 10, 100, and 1000 Base-T standard. The main unit performs the bulk of the tests such as determining the LAN device type, the LAN speed, and duplex (10, 100, 1000, 1000 MB/s, half or full duplex) and whether PoE (Power over Ethernet) is present without the need of the Remote Probe. The Remote Probe adds the ability to trace cable locations by audibly tracing tones cables with all four pairs to insure compatibility with all types of Base-T LANs. The TVR1G helps you locate faulty hubs, PCs, or cable connections that are stopping or limiting the performance of your network.