Hamburger Mini Speaker

Via GadgetSin:

The hamburger styled portable speaker is designed by Shunsuke Iwakami, a Japanese designer. It’s made of plastic, and has a built-in rechargeable battery charged via integrated USB connector. And the 3.5mm standard audio jack allow you to connect the mini speaker with computer, MP3 player, iPhone, or other audio devices with 3.5mm audio jack. Besides, the hamburger mini speaker measures 2.5 inches in diameter, and has a On/Off switch.