Connect with AUX 3.5 and receive power by USB, There is a volume adjustment button, Power 6W (3W+3W), Signal-to-noise fatio. ≥60dB, Frequency (Frequency Response). 90Hz – 20Hz, Power supply. DC5V, Driver size. 36mm x 2, Impedance value). 4Ω, Size. 74 x 94 x 147 mm.