1. Low frequency resistance noise reduction
2. Small as nails, invisible
3. Convenient volume adjustment
4. ON/OFF power key
5. Low power consumption, long lasting battery
6. Applicable to mild and moderate hearing loss
1. Max Sound Output: ≤115dB + 3dB
2. Max Sound Gain: 30dB ± 5dB
3. Harmonic Wave Distortion: ≤10%
4. Frequency Range: 300Hz~3200Hz
5. Input Noise: ≤29dB+3dB
6. Battery: A10 Zinc air battery
7. Rated Current: ≤5mA
8. Working Voltage: DC 1.45V