1.Max sound output:118±4dB
2.Sound gain: ≥32dB±2dB
3.Total harmonic wave distortion: ≤7%
4.Frequency range:300-3800MHz
5.Input Noise:≤32dB
6.Voltage:
7.Current:≤2mA
8. Full charging about 3 hours
9. Normal working about 45 hours
List:
1 x Host
1 x USB cable
5 x Earplugs
1 x Brush
1 x English manual
1 x Shockproof box
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