Parameter:
1. Max OSPL90: ≤117dB
2. HFA OSPL90: 110dB±4dB
3. Maximum Sound Gain: <40dB
4. Average Sound Gain: 30dB±5dB
5. Total Harmonic Distortion: ≤7%+3%
6. Equivalent Input Noise: ≤29dB+3dB
7. Frequency Range: F1≤250Hz, F2≥5000Hz
8. Battery: Lithium battery
9. Work Current: ≤5mA
10. Working time: 18-20H
11. Charging time: 2-3H

Feature:
1. Applicable to mild, moderate and moderate to severe hearing loss
2. Charging case, compatible with storage function
3. With anti loss ear hook
4. Wearing comfortable
5. Big power, big sound
6. Battery: hearing amplifier 45mAh, charging case 600mAh
7. Long lasting use

8. Original sound quality, pleasant and clear sound

Packing list:
1. Hearing amplifier 2pcs
2. Type-C cable 1pc
3. Charging case 1pc
4. Cleaning brush 1pc
5. Manual 1pc
6. Earplugs 6pcs（3 Size）