Check the listing for details. PCI-E Express 2 Serial Port DB9 COM RS232 Converter Adapter Controller for PC. Condition: New. Listed at 11.98 USD. Features: Connects more serial devices to your computer easily. Two standard external RS-232 DB9 serial ports. Compliant with Single-Lane (x1) PCI-Express specification revision 1.0a. Supports up to 2.5Gbps speed. Interface: 1-Lane (x1) PCI-Express port 2 external RS-232 DB9 ports Supports up to 2 Fast serial ports Easy plug and Play installation Automatically selects IRQ (Interrupt Request) & IO address Supports IRQ sharing Multi card capability allow for upgrade with additional serial or parallel cards With MCS922 Chipset Operating System: Windows 98 / Me / NT4.0 / 2000 / XP / Vista / Win7 / Win8 / Win 10 / Server 2003 & 2008 Contact Us (1) We strive to provide the best service as possible, commit to resolve all problems and give fast shipping. (2) Please contact us before giving any negative feedback. If you have any questions, please do not hesitate to contact us. Payment (1) All payments must be prepaid and cleared. (2) We only accept Paypal payment. After checkout, please make through Paypal service. Shipping (1) Buyer is responsible for any incorrect address and undeliverable address. We reserve the right to charge the shipping fee again for returned items due to wrong address. We take the paypal address as your shipping address. Please make sure your shipping address is correct during check out. (2) Your order will be shipped within 24 hours after payment is cleared (Sat. & Sun. excluded and holidays) (3) We ship orders using USPS (United States Postal Service). The shipment usually takes 2-4 business days, excluding holidays, Saturday and Sunday (4) Local pick up is not available. (5) No International Shipping. Warranty (1) This product has a 30-day warranty. (2) Warranty does not extended to any products that are buyer's negligence, abuse, misuse, improper installation or physically damaged on the buyer or user's part. (3) Please contact us before making a replacement or refund. (4) In case of returning, buyer must pay their own postage and shipping fees for replacement or refund. We will provide replacement or refund after product is received.