Seeing such a small thing, you may think it is a Bluetooth earphone. But maybe no Bluetooth earphone is so small. In fact, it is a micro MP3 which is so small (16mm x 25mm x 22mm) that it can be directly put into the ear. Some people may ask what about the other ear? Don't worry. It also has an earplug which is connected through a fine headphone cord. The Micro MP3 weighs only 0.28 ounces and you can still enjoy stereo music when it works. Currently, the overseas price of 2G is $ 55.