Guangzhou Chuanteng Electronic Technology Co., Ltd. was established in 2005 , a new enterprise specializing in designing, producing and selling portable mini vibration speaker (vibro /vibrating speaker, resonance audio/sound), computer speaker. We have obtained a national patent of vibration multidimensional sound effect which is the core technology of our company. By using such technology, it break through the traditional way of sound transmission, without any louder speaker inside but able to transform any solid surface into a fantastic new syntonic 3D effect speaker and produce a better quality bass effect. send to seleneni at yahoo dot com.All our products are CE,ROHS approved.