The Logitech Harmony 300 Controller is a universal remote that lets you control up to four devices with one button. You can set it up using the Harmony software on your computer. You can customize the Watch TV button to turn on or off your TV, cable/satellite box, and AV receiver, and switch them to the right input. You can also add up to five favorite channels to your remote for quick access. The Harmony 300 Controller is compatible with over 225,000 devices from more than 5,000 brands.