Product Description Dtech Db9 To Rj45 Serial Adapter Rs232 Female To Rj-45 Female Ethernet Converter Compatible With Standard 9 Pin Rs-232 Devices connector A: DB9 9 Pin Female connector B: RJ45 8 Pin Female Data cabling transmission signal up to 20M compatible with Standard 9 Pin D-sub RS-232 Devices eg computer laptop, printer, modem, router, PDA, POS device, digital cNc machine tool, Barcode scanner, etc Please be Noted: DB9 serial RJ45 adapter is only an adapter for extending RS232 serial data (max distance 65ft), not a console adapter Usually this adapter needs to be used in pairs DB9 serial data is transmitted over the network cable To use this pair of adapters, you need to connect them with a cat5e or cAT6 cable WhatAs Included 1x DB9 Female to RJ45 Female Serial Adapter California Prop 65 Warning : This product can expose you to chemicals including arsenic, which is known to the State of California to cause cancer. For more information visit to the website.