... PSP 2 FM radio, Li-battery, RMS: 3Wx2 Portable Speaker With FM Radio1. SD/TF reader and USB reader-MP3 ... Frequency Response: 60Hz-20KHz7. Signal to noise ratio: >85dB8. With earphone jack9. Built-in effective digital amplifier, sound more pure ... . With rope, stand11 External li-battery, convenient to carry12 Output: 3Wx213. Product size: 188x72x25mm14. Product weight: 215g Portable Speaker With FM ...