Check the listing for details. FTDI USB Serial Tuning cable Megasquirt Engine Management System ST-9M. Color: Black, Condition: New. Listed at 44.95 USD. This listing is for a single USB to RS232 serial tuning cable that connects to Megasquirt Engine Management System (EMS) Fast same day shipping on orders received before 3 pm Pacific TimeWith the cable you get my installation instructions, email address and cell phone number. Supported Operating SystemsDrivers are available which allow USB FTDI devices to work with the following operating systems:· Windows 11 x32· Windows 11 x64· Windows 11 x32Windows 10 x64· Windows 8 x32· Windows 8 x64· Windows 7 x32· Windows 7 x64· Windows Vista x32· Windows Vista x64· Windows XP x32· Windows XP x64· Windows ME· Windows 98· Linux· Mac OS X· Mac OS 9· Mac OS 8· AndroidReturn Policy14-day return exchange policy if and only if you pay to ship both ways on the exchange if you made the mistake. If you bought the wrong physical connector you pay, regardless of what listing title states.If I send you wrong cable or the connector is correct and the cable does not work I will refund your money or ship you the correct cable if I can at no charge.1-year warranty if and only if the product has not been modified. You pay return shipping and I will ship you a replacement at no charge.Technical SupportI stand behind everything I sell and I promise that I will do my best to troubleshoot any problem you encounter. All I ask of you is that you give me a chance to correct any issues you have before you provide your feedback. Contact me if you don’t see what you need or you have questions.