Electroacoustic performance:

1. Maximum Saturation Sound Pressure Level: ≥120 dB
Full-level gain: ≥30 dB
3. Average Gain: ≥18dB
Harmonic Distortion:

a) When the frequency is less than 1000 Hz, the maximum is no more than 10%
b) When the frequency is greater than 1000Hz, it does not exceed 4%
Equivalent Noise: ≤50dB.
Frequency Response: Not Narrower Than 250Hz to 3500Hz

Features
Brand new and high quality hearing aid sound amplifier
Super mini size and light weight, not easily to be seen
请佩戴前将音量调至最小。
Gradually increase the volume to avoid a sudden increase in sound
Convenient for watching movie, enjoying the drama, attending meeting, or having class, it could help you hear the sound clearly and loudly

Specification:
1. Max sound output: 110±5dB
2. Sound gain: ≥30dB
3. Total harmonic wave distortion: ≤10%
4. Frequency range: 300-4000Hz
5. Input noise: ≤40dB
6. Voltage: DC1.5V
7. Current: ≤4mA
8. Color: As pictures

Package Included:
1 x Hearing Aids
2 x AG3 Button Cells
1 x Instruction Manual
1 x Case
3 x Units of earplugs of different sizes