1. Applicable to mild, moderate hearing loss
2. Noise reduction modes (normal, moderate, conference, outdoor)
3. Procedure signal sound
4. Volume memory
5. Mode memory
6. Quick charge: 2-3 hours
7. Working time: 10-12 Hours
8. Color: black, white
1. Max Sound Output: ≤115dB + 3dB
2. Max Sound Gain: 30dB ± 5dB
3. Average Sound Gain: 28dB ± 5dB
4. Harmonic Wave Distortion: ≤5%
5. Frequency Range: 300Hz~7000Hz
6. Input Noise: ≤ 26dB
7. Battery: Rechargeable polymer lithium ion
8. Rated Current: ≤ 5mA
9. Working Voltage: DC 3.7V