White plastic gold-plated plug, reliable contact, super transmission performance, signal stability increased by 40% ^^ High quality DB9 solderless RS232 D-SUB serial to 9pin port terminal male and female adapter connector breakout board ^^ All signal ports are clearly named and labeled on both sides of the board for quick wiring. ^^ It can connect all kinds of serial devices. Such as computer and tax control machine, digital camera, PLC, PDA, MODEM, set-top box, barcode machine, industrial instrumentation and other equipment for communication. ^^ Suitable for variety of pin connections required to use serial communications industrial control products.