Speaker: external magnetic
Speaker size: 3 inch
Total harmonic distortion: <10%
Speaker sensitivity: 85DB
Frequency response: 45-1 6KZH
Impedance: 40
Power input: USB 5V/2.3-3. 5A
Output power (RMS): 5W*2
Speaker unit impedance: 40
Frequency response: 50HZ- 16KHZ
Signal to noise ratio: ..