Specifications:

1) Rated Power: 2.5W

2) Oscillator Impedance: 4Ω

3) Frequency Response: 150Hz - 15KHz (depending on the resonance interface)

4) Operating voltage: 3.2-5 .5 V

5) Working current: ≤ 0.5A

6) Weight: ≤ 25g

7) packing list: vibration speakers, trigeminal cable