Description: Transmit signals between your RS232 ports over CATS, CAT5E, and CAT5 network cables. The new upgrade, compatible with all standard DB9 serial devices, all day continuous work, stable and reliable performance. Interface with super-thick alloy, reducing the transmission impedance, reduce signal loss, oxidation resistance, corrosion resistance, wear resistance,Transmits signals up to 100 FT.Requires no external power Applications: for desktop computer, digital machine tools, PDA, bar code and other DB9 serial devices,Easy and Convenient to use. High-quality environmentally friendly PVC material, super wear-resistant, Integral injection molding. Package Includes: 1 Piece RS232 to RJ45 Adapter