★ Speaker performance parameters
★ Output Power：RMS 4W（2W+2W）THD=10%
★ Frequency Response：150-18000HZ（+/-3dB）
★ SNR：≥70 dB
★ Speaker：OD 45mm, Anti-Magnetic 4Ω(ohm)3W
★ External USB power cord
★ Speaker size：74.5*50*52mm
★ USB 5V  supply  or adapter DC-5V supply power，Power can not be higher than 5.5v
★ Insert Card TF card Professional use。Retractable cable to the computer
Built-in lithium battery
   Color: Black, Green,Sliver,Blue,Pink