It's nice to have a speaker to make your iPhone pump out the tunes a bit louder, but most of them suck the juice out of your battery and cut the party short. Not the ArkCanary II, which uses an old gramophone shape to turn up the volume without using any power.

For only $13, this horn-shaped speaker enhancer can crank up the volume for you. Sure, it's not the most portable thing in the world, but it's pretty cool looking, no?

Ark via Gizmodo