From the Manufacturer Byte Brothers helps technicians, installers and Dyers master jobs and solve problems with tools that we manufacture. To be a Byte Brothers tool, it must include 3 qualities: Innovation- because that is what makes us different and moves our company and customers forward. Top quality- because our work requires tools that repeatedly perform. Affordable- because our creativity and usefulness must be available to all. As your partner, Byte Brothers is here to grow your business, help complete your jobs and enhance your skills with high value products, US based customer support, training and quick upgrade and warranty service. Whether you are in the computer, data com, audio/video or security field, you will find Byte Brothers products designed for you at a price you can afford. Product Description TVR10/100/1000 (Model TVR10/100/1000K) LAN Tester. Get instant answers to a LAN device"s most critical questions: Is it ON? And what are its capabilities (10MB, 100MB, 1000MB, half or full duplex)? Perfect for a quick check of your equipment configurations including the negotiated speed between 2 devices? Or put one in each of your remote offices as a quick troubleshooting tool when the remote cannot connect to the central office. Includes a tone probe for tracing cable and cable testing capability. Compatible with all network devices. Features: Instantly displays a LAN devices 10, 100 or 1000Mb/s capability; Inline mode to display negotiated speed; Differentiates between data and link pulses; Poe detection LED; cable tester (pairs); Tone generator with Probe included. Includes: TVR Main unit; Probe with built-in Remote; Pouch; patch cords (2); and batteries (2).