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1. Peak gain (dB): 35dB, suitable for mild to moderate hearing loss 2. Intelligent noise adjustment: reduce the damage of noise to the eardrum. 3. Charging time: 2-3 hours of charging (6 hours for the first charge) can last for a whole day (about 30 hours). 4. Bring different size earplugs to reduce howling and noise. 5. Peak OSPL 90 (dB SPL): 125dB 6. Decibel sound pressure level: 115dB 7. Peak gain (dB): 35dB 8. Frequency range (Hz): 300-5500HZ 9. Distortion: 500Hz: 3.0%, 800Hz: 3.0%, 1600Hz: 5.0%
