Input: 5V  Output:3.7V---- 1000mA
Speaker unit:2W*2
Output power:2W*2  4Ohms(1KHz 10% THD)
Frequency responce:275Hz-20KHz    Features:
1) Can be work for iphone/ipod MP3/4/Mobile phone 
2) Built in Li-battery                                                                  

3) With FM radio

13.8*5*5.2cm giftbox

53.1*38*30cm/60pcs 12/13KG Carton