Performance: 1. Comply with PCI2.1 specification and support 32-bit PCI bus. Plug and play, automatically assign and I/O addresses. 2. One host can support multiple multi-serial cards. Data bit length: 4, 5, 6, 7, 8 bytes. 3. Verification method: NONE EVEN OLD SPACE MARK. Stop bit length: 1, 1.5, 2. 4. Data flow control mode: None, hardware, Xon/Xoff. 5. Support 2000/2003/XP . The maximum data mission rate can reach 1M/S.<br><br>Install the PCI TO R232 expansion card on the computer 1. Turn off the computer and devices connected to the computer. 2. Open the case cover, insert the card into the unused PCI slot, and fix it. 3. Close the case cover and connect the leads of the PCI to R232 expansion card. 4. Start the computer, and the driver be installed below. Matters needing attention: 1. When the PCI TO R232 expansion card is in the PC self-test, the system prompt that there is a device. 2. Each PCI TO R232 expansion card occupies an interrupt, which is automatically assigned by the system. The sequence number of the port is determined by the PCI position. 3. In the system, if no other similar products are installed in the system, the port name generally starts from COM3, which is related to the number of COM ports on the motherboard. 4. In the system, if you want to replace it with a new card and a new driver, you must delete the original card in the "multi-function card". 5. It is strictly forbidden to insert or remove the card and cable connection under any circumstances. Material: PCB colour: black<br><br>Package Contents: 1 x RS232 Expansion Card 1 x CD driver<br><br>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.