Adidas has released a new set of wireless earbuds that promise to keep working when your workout stops, because their new RPT-02 SOL earbuds feature auto-charging technology.

The headphones make clever use of an Exeger Powerfoyle solar panel built into the headband. This absorbs light of any kind, whether natural or artificial, which means you can charge the battery both indoors and outdoors without having to plug your headphones into a wall outlet.