S/N Ratio ≥ 80dB Power Output 3W*2 Impedance 4 Ω Frequency Response 120Hz-20KHz Speaker Unit / Size 5.08cm (2") Battery Type Lithium cell 18650 BT Range 7-10 mtrs Distortion < 0.3% Calling Available Wireless Portable multimedia speaker with BT/TF/FM/AUX IN