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1. Sound amplifier can amplify sound 30 times
2. Silicone earmuffs, not easy to slip off, very comfortable even if worn for a long time.
3. Safe to wear and will not hurt the ear canal
4. 4 different amplification frequencies are adjustable, you can turn up the volume from low to high to meet your needs.
5. Comes with charging base and power adapter, just put it in the base to charge. A full charge provides 8-10 hours of continuous use.
6. Sound gain: 30+/-5dB
7. Frequency range: 100~4000Hz
8. Signal-to-noise ratio: less than or equal to 45dB
9. Operating Voltage: 1.2V
10. Working current: less than or equal to 10mA
11. Material: Silicone+ABS+Metal
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