Features:
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: D.C.3.7V
7.Current: ≤2mA
8. Full Charging About 3 Hours
9. Normal Working About 45 Hours
Packaging list:
2 x Hosts
8 x Earplugs
1 x Brush
1 x Shock-Absorbing Box
2 x USB Charging Cable
1 x English instruction Manual