Havit USB 2:1 Mini Subwoofer SK450

Havit HV-SK450 2.1 multimedia 3.5mm USB powered speak.Output power RMS 5W+3Wx2 (THD<1%).Loud speaker 3″+2″x2.Frequency response 100Hz-20 KHz. Line in the interface 3.5mm stereo jack plug.Signal to Noice Ratio 85dB.Power input 5v DC power adapter