The close-up of the digital device on the radiator with a clear display.

The video opens with a close-up of a white radiator with a small digital device attached. The device has a green display showing '21' and '905'. The ISTA logo and tagline 'Switch to Smart' appear in the top right corner. The text 'Für Ihre Heizkostenabrechnung' appears on screen. The device is then shown in a more dynamic shot, floating against a white background with concentric green rings emanating from below it. The text 'haben wir die einfache Komplettlösung mit automatischer Ablesung per Funk.' appears. The final shot shows the device again with the text 'Jetzt kostenlos Angebot anfordern.'