★ R.M.S:5W+3W*2 ★ Drive Unit Full Range: 2.25"★ Frequence Response: 20Hz-20KHz ★ Rated/Input Impedance: 4ohm ★ S/N Ratio : ≥50dB★Separation:≥45dB ★ THD :≤0.5%★ Power:USB power or AC power