When you’re out traversing the great outdoors, there’s a decent chance your phone is going to die after a while. Your battery is only going to last so long from all the nature photos you’re putting on Instagram, so you’ll need to bring a backup battery. Of course, if your excursion is longer than a day or two, your backup is going to run out juice too.

While you can use solar power to give your gear more energy, you usually have to wait on a sunny day for it to be the most effective. What if instead you chose an option that only needed to have a stream nearby? The Blue Freedom will use flowing water to charge all of your gear by providing you with a portable hydropower plant. It’s just a little bit larger than a frisbe, and once the little turbine is removed, can be hooked onto a nearby stick so it doesn’t float off.