The Triplett TVR1/1/1 has been designed to test LAN devices and cabling to the 1, 1 and 1 Base-T standard. The Main unit performs the bulk of the tests such as determining the LAN device type (is it a hub/switch or PC?), the LAN speed and duplex (1, 1, 1 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 three types of Base-T LANs. TVR1/1/1 helps you locate faulty hubs, PCs or cable connections that are stopping or limiting the performance of your 1, 1 and 1 Base-T LAN. You can even go inline between two LAN devices and determine the final negotiated speed and duplex of the link. Designed for both the LAN installer and repair person, it is useful documenting legacy LANs, installing and repairing LANs or adding equipment to existing LANs. Complete with (2) RJ45 cable, RJ45 to cox adapter, case, and (2) 9V batteries.