Salvapantallas literally translates to "screensaver." It's a modern and unexpected word to find in a romantic song, making it instantly memorable and intriguing.
In this song, Andrés Cepeda uses it metaphorically to describe his beloved as his protector and constant light. He sings, "Tú por siempre serás mi salvapantallas" (You will forever be my screensaver), implying that she is the one who keeps him safe and illuminated, even when life tries to blind him. This creative use of a contemporary term gives the song a unique and endearing twist.
The whole song is a list of things Andres Cepeda says he can afford to lose. Let them swap the beach's freshness for a hot sea, let them black out the nights when the moon is full, let them take the rhymes — Que se lleven mi alma que igual no vale tanto ("let them take my soul, it's not worth that much"). The bargaining gets steeper every verse and the price never moves: one person stays. No te vayas ("don't go") turns up in seventeen of the fifty-nine lines.
The title is where the grand gesture turns into a phone joke. A salvapantallas is a screensaver — the picture that sits on a screen when nothing else is happening — and it is the last thing he asks to keep: Que si me quieren dejar ciego / Tú por siempre serás mi salvapantallas ("if they want to leave me blind, you'll forever be my screensaver"). Blind him and the image still runs. The bridge does the sums out loud: Sin el azul del mar puedo sobrevivir ("without the blue of the sea, I can survive"), but Pero una hora sin ti sería mi ultimo aliento ("but an hour without you would be my last breath").