Mini speaker: 1.Output power: 6W 2.FM Frequence response: 150Hz-18kHz 3.Good quality and best price Mini speaker: 

1. Output: RMS 6W.

2. Frequence response: 150Hz-18kHz (±3dB).

3. Signal to noise ration(SNR): ≥80DB.

4. Loud speaker: 1.8 inch (external diameter: 45mm).

5. Magetic resistant: 4Ohms.

6. Sopport: USB and SD card.

7. Color selectable: blue, pink, green, silver, black, ect

8. FM radio function

9. Accessories: 1 battery and 1 USB cable

metal mini speaker/ support usb & SD card