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This DB9 RS232 serial port breakout board features solder-free terminal design, enabling quick and tidy wiring without soldering work. The package includes one male and one female DB9 connector adapter with a practical screwdriver and premium black rubber core for reliable insulation and anti-interference performance. Standard 9-pin pin definition ensures perfect compatibility with RS232 serial equipment, industrial controllers, PLC and serial communication modules. Compact structure, simple installation and durable build make it ideal for electronic DIY projects, serial port debugging, industrial control wiring and equipment maintenance.