Work with all sound source with 3.5 audio interface product like:MP3,Computer,mobile p
hone,CD player etc
*No adapter or amplifier required,USB Bus powered. *Inbuilt rechargeable battery with 3 hours working time
*Vacuum bass inbuilt,360-degree sound field
*Volume can be controlled easily and directly on the product

Output power ：2W
impedance ：4 Ω
frequency  response：90Hz - 20KHz
SNR:：≥80dB
distortion degree：≤0.3%