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Max Sound Output: 110±5dB
Sound Gain: ≥45dB
Total Harmonic Wave Distortion: ≤10%
Frequency Range: 450-3000Hz
Input Noise: ≤32dB
Voltage: USB 5V/50mA
Current: ≤8mA
Battery: rechargeable battery
Battery Charing: 2 hours
battery using: 8-10hours
Mode option: 3 modes
Product size: 23*18*22mm
Net. Weight:4.6g
