The Behold TV 401 is a TV tuner card that allows you to watch and record television on your computer. It typically connects to your PC via a PCI or PCIe slot, and it may offer features such as analog TV tuning, FM radio reception, or video capture (depending on the model). The card allows you to input TV signals (such as NTSC or PAL), and then view and record TV programs directly on your PC.

The Behold TV 401 Windows driver is the software that enables the operating system (Windows) to communicate with the Behold TV 401 hardware, ensuring that the TV tuner functions correctly, and the system can access features such as video capture, TV signal reception, and FM radio.