... & FM Radio 2, USB disk, Micro SD/MMC card 3, Rechargeable 4,RMS: 11 Watts 2012 hot selling high powered 2 Way Plastic Speaker ... Box Features:1, NEWEST 2.1 multimedia speaker2, With SD/MMC card jacks 3, With USB 2.0 slot ... (SW)S/N: ≥90dB Stereo Isolution: 75dBDrive units: (2.5" 4ohm full range frequency) * 2(L/R) (3" 2ohm bass frequency) * 1(SW ...