There are several ways in which a person can capture natural energy. Forget using wind, the sun, tides, and geothermal activity — you can use your own body to produce energy to charge all sorts of electrical devices.

Orange, a music company, and GotWind, a firm specializing in renewable energy, have teamed up to create a device named the Dance Charge. Dance Charge weighs 180 grams and you strap it around your arm. Dance Charge then uses the kinetic energy generated by your body in motion to charge up whatever you have connected to it.

The neat contraption also uses a system of weights and magnets to produce electric current to top up the storage battery. A prototype of the device was shown and tested at this year’s Glastonbury Festival.