... *3W. *Various color available. *CE&RoHS Mini USB Speaker for Mobile Phone Model No.: GVMS-1041)Housing material: Aluminum2)Output: RMS ... %)3)Frequency response: 150Hz~18KHz4)Signal and Noise Radio of power amplifies: ≥ 80dB5)Loudspeaker: Dias 45mm, 4 Ohms, Diameter: (45 ... Radio: 87.5-108MHz8)Power supply input: Build-in lithium battery 550mAh, USB9)Compatible with iPhone & iPod, mobile phone, MP3, MP4, ...