1. Output: Rms 4w(THD=10%) 2. Frequency response: 150Hz~18KHZ 3. Signal and Noise Radio of power amplities: ≥60db 4. Loudspeader: Dia 40mm, 4 Ohms 5. Line input: configure 3. 5mm stereo's plug 6. Power supply input: 4x1. 5V AAA, DC-6V, USB Accessories： 1)Pc USB Power Supply Cable 2)3. 5mm Stereo connect Cable 3)Ipods docking station Packing Details： Product size: 18. 3 X 4. 7 X 5. 2 cm Package size: Dia 8 X 21. 7 cm 1pc/colour Box 40x32x43. 4 cm / 40 pcs/CTN N. W. /G. W. : 8. 6 KG /10. 1 KG