A solar-powered, waterproof Bluetooth speaker

The Lemon California Roll is a bluetooth speaker with a waterproof design and built-in solar panels.

Available now for presale, it retails for $249 (converts to roughly $345, £200) and will ship in the US in March or April 2017.

The California Roll is impressively built, but let's not forget about the music.

It's a powerful speaker with maximum volumes loud enough to fill a room and get a party going.

The speaker has 33 solar panels that were designed for especially for it.

The Lemon speaker is oval to make it easy for smaller hands to grip.

Lemon will offer a backpack-like strap for anyone who wants to take their Lemon speaker while rock climbing, skiing or jogging around town.