The Pinnacle Systems PCTV 800i PCI TS Capture is a TV tuner card designed to capture digital television signals, often used for watching and recording TV on a PC. This device is typically used with a PCI slot in desktop computers and supports DVB-T (Digital Video Broadcasting - Terrestrial) signals, which are commonly used for free-to-air digital TV broadcasts.

The PCTV 800i is an older model, so finding drivers might require some extra effort, but it's important for proper functionality of the TV tuner hardware, such as channel scanning, video capture, and compatibility with software like Pinnacle Studio or third-party TV software.