Designer Adam Hammerman created this nifty concept design he calls the Uplink Audio Strap. It connects to a variety of MP3 players and acts as a surrogate for headphones. It features four ultrasound speakers, meaning you are the only person who can hear the music.
The device also has flexible solar panels. This means it requires no power or batteries. You just gotta run out in the open air, with the sun shining down on you, and you are set.
Of course, like a lot of neat tech, this is a concept design for now. We’ll keep you updated on when and if the design will enter retail outlets.