mini stereo speaker Standard 3.5mm audio plug,apply with all music player and digital products 1.Output:3w*2 2.Power DC 6.0V USB charging 3.Drive units 3.5mm,4.Frequency response:100Hz~20KHz5.Impedance 8Ω 6.Compatible with CD player,PC/MAC,MP3 player,MP4 player, DVD player protable mini stereo speaker