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This 3-Pack DB9 serial adapter contains three common types: female to female, male to female, male to male, fully covering daily RS232 serial connection demands. Mini lightweight design fits narrow installation spaces and is convenient for storage and carrying. Adopting standard 9-pin pin definition, it provides reliable and stable serial data transmission with excellent anti-interference performance. Precision-made interface ensures tight plug-in, preventing poor contact and signal interruption. Plug and play without extra setup, perfectly suitable for desktop computers, industrial controllers, serial communication equipment and RS232 data transfer application scenarios.