1. High power, applicable to mild moderate and moderate to severe hearing loss
2. Noise reduction modes (normal, moderate and noise reduction)
3. Procedure signal sound
4. Volume memory
5. Mode memory
6. Color: beige, metallic blue,black, champagne, silver
1. Max Sound Output: ≤130dB+3dB
2. Max Sound Gain: 51dB ± 5dB
3. Average Sound Gain: 37dB±5dB
4. Harmonic Wave Distortion: ≤5%
5. Frequency Range: 400Hz~5500Hz
6. Input Noise: ≤29dB±3dB
7. Battery: Rechargeable polymer lithium ion
8. Rated Current: ≤5mA
9. Working Voltage: DC 3.7V