MDTC-1045 Mini speaker for PC,computer,mobile phone,outdoor. MDTC-1045 Mini speaker 1. Input Power, USB 5.0V 2. Jack ,3.5 mm stereo3. Output, RMS 3W*2(THD less 1% )4. Frequency, 100Hz - 20kHz5. Impedance, 4 ohms6. Sensitivity, 85db(A)7. Material, ABS plastic MDTC-1045 Mini speaker