... same song,different feeling, perfect sound effect. 2. Power supply:DC5V Power consumption: Max 2.5W Frequency:100Hz~20kHz support ... MP3, MP4,PC,Iphone,ipod, computer,mobile and etc standard 3.5mm audio ... called preaching vibration multidimensional sound,which subvert the traditional audio pronunciation,it has no loudspeaker itself,when it works ...