Output power:6W(3W*2)
Frequency range:150-18KHz(±3dB)
SNR:≧80dB
Horn description:1.77inch(45mm)
 Impedance:  4 ohms
Voice input:3.5 stereo audio/U Disk/SD/MMC  Card
Power supply mode:Bulid in lithium battery
Power Adapter:5V/1000mA
Connect:USB
Battery voltage: 3.7V
Battery Charge voltage: 4.2-5V
Battery Capacity: 500mAh
Bulid in MP3 player, build in FM, can play MP3 file in SD/MMC, can read U disk 
Supports all ipod charger (with 30pin) for playing music