Sound gain:≥50dB
Total harmonic wave distortion:≤5%
Frequency range:3004000Hz
Input noise:≤30dB
Voltage:DC 3.7V
Current:≤4mA
1 X Rechargeable Hearing Aid (With Li Battery)
2 x Ear Hooks
1 X US Standard Charger
4 x Earplugs
1 X User Manual