If the sun's out, you've got power to blast your tunes with the Eton Rukus Solar Bluetooth Speaker. This speaker lets you connect with any Bluetooth-enabled device, so you can rock out whether you're at the beach, or at a backyard barbecue. And don't worry if the sun disappears. The internal lithium battery will keep your music playing for up to eight hours. The stereo streaming capability and two full-range speaker drivers give you crystal clear sound, while the energy-efficient E Ink display is easy to read, whether the party happens during the day, or at night. This speaker comes with a USB port, so you can charge your mobile device while listening to your music. And when the party ends, just store it in the included storage net, and you're good to go.
I especially like these because once I fully charged the device there was no reason to worry about re-charging it as long as it has direct sunlight. On my last trip to the desert I left the speakers out on a picnic table and it played the entire trip. Speakers are bluetooth and have an impressive range. I was able to easily switch devices with others on the trip so we could hear each others playlists. Highly recommended!