Plastic gold-plated plug, contact, super transmission performance, signal stability increased by 40 percent DB9 solderless RS232 D-SUB serial to 9pin port terminal male and female adapter connector breakout board All signal ports are clearly 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, , PDA, MODEM, set-top box, machine, industrial instrumentation and other equipment for communication. Suitable for of pin connections required to use serial communications industrial control . size:48x34x20mm Material:Engineering plastic and metal colour:black Package Contents: 1 x DB9 Female Solderless Connectors 1 x DB9 Male Solderless Connectors Only the above package content, other are not included. Note: Light and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is 1-3cm. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.