... mobile phone, MP3, MP4, PC, etc. SD / MMC card Portable Mini speakerCan play SD / MMC card, U disk MP3 audio file format,.Can be ... 3Wx2 THD = 10%;Frequency response: 150-18KHZ (± 3dB);SNR: ≥ 80dB;Speaker: 1.77 inch (OD) magnetically shielded 4 ohm;Line Input ... .7cm;GW / NW: 34/33KGS;Accessories: USB cable, audio cable. Portable Mini speaker for mobile phone, MP3, MP4, PC