Altec Lansing VS2620. Tweeter size: 75 mm. RMS rated power: 5 W, Frequency range: 60 - 20000 Hz, Sensitivity: 92 dB. Headphone connectivity: 3.5 mm. Type: Portable speakers, Dimensions (WxDxH): 135 x 120 x 214 mm, Audio output channels: 2.0