Features:
1. Maximum sound output: 129±3dB
2. Sound gain: ≥40±5dB
3. Total harmonic distortion: ≤10%
4. Frequency range: 450 - 3400 mhz
5. Input noise: ≤32dB
6. Voltage: d.c.1.2V
7. Current: ≤1.2 ma
8. Fully charged for about 5 hours
9. Working hours exceeding 30 hours
Package list:
1 x host group
4 earplugs
1 brush
1 x User Manual
1 USB charging cable
1 adapter
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