Product parameters：

1.  Max sound out put: 126±3dB
2.  Sound gain:≥ 28dB±5dB
3.  Total harmonic wave distortion:≤ 3%
4.  Frequency range:F1 ≤ 200Hz F2≥ 4500Hz
5.  Input Noise:≤26dB±3dB
6.Voltage:D.c.3.7V
7.  Current:≤1mA
8.   Full charging with about 2 hours
9.   Working about 25 hours
10.   Both recharge by Magnetic Charge Box for more than 100h working time
11.   Digital button control, and Noise Reduce too.
12.   Digital charging case clearer when to charge
13.   Convenient to carry around

Packaging list：

Main Unit x2
Earplugs x6
Brush x1
User Maual x1
Type-C Charge cable x1
Charge Box  x1