1) The size of our product is only as the size of a purse before unfolding. When unfolding, the size can be 10 times the size when folded. Usually the Fo of a 3"- speaker is 180HZ. But when using our leather-cavity technique, the Fo can reach 160HZ and effectively increase the bandwidth to make the timbre more beautiful. The Fo of speakers can be effectively lowered by using this leather-cavity technique, which is our patent. The general little speaker cannot be made in a very small size is because of the problem of cavity volume, while the compression ratio of a leather cavity can reach 1: 20, which solve this problem perfectly. That's why our products can be in the smallest size with the best tone quality to be portable in an easy way.

2) To save energy, we use unique APC power supply which can prolong a cell's using time as long as 6 to 10 times. The cost is the lowest at present (Only 2 No. 7 cells are needed which can work constantly for 30 hours. ). Being portable, it is suitable for MP3\MP4\portable computers when they are working outdoors.

3) It also has perfect and as much as over 10 different kinds of protective functions, such as over-voltage, over electric current, over- heat, short circuit, etc. It is coated with metal lacquer and contains a black leather cover. It looks fine and delicate. It meets consumers'needs for fashion and unique.

4) It has digital amplifier, which makes one speaker contain a stereo effects. Its tone quality is much better than normal small speakers.