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Feature
| Max Sound Output | 129±3 dB |
| Max Sound Gain | 43±5dB |
| Harmonic Wave Distortion | ≤10% |
| Frequency Range | 450~3000 hz |
| Input Noise | ≤32dB |
| Battery | lithium battery |
| Working Current | ≤10 mA |
| Net Weight | 60 g (without Battery) |
| Special Function Key | N-H, No friction sound |
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