and high quality! It's widely used in the securities market, education and communication field. DB9 pin Serial Port: It's suitable for DB9 pin port devices Manual Share Switch Box: No need to unplug and plug in wires when changing from different serial devices such as printers, computers. Suitable for 2-way computer RS232 interface switching, 2 In 1 Out. Please note: This is not aVGA interface. This is RS232. If you want to know more, please contact us. Specifications: Size: approx. 12x9x3cm/4.72x3.54x1.18in Color: Black Material: Iron Package Contents: 1 x RS232 switch (Due to different product batches, the appearance may vary, which does not affect the use) Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.