portable mini spealer, Material:metal, perfect sound. application for mobile phone, ... : RMS 3Wx2 THD = 10%;Frequency response :150-18KHZ;SNR: ≥ 80dB;Speaker: OD 52mm outer magnetic 4 ohm;Line Input / Output: 3 ... / NW: 18.4/17.4KGS;Accessories: USB cable, audio cable. Portable speaker for mobile phone, MP3, MP4, PC, etc