| Brand | Unbranded |
| Manufacturer | Unbranded |
| Model Number | 6537766633659_39254891987131 |
PRODUCT DESCRIPTION 1.100% Brand new and high quality2.Every product will be checked carefully 3..Applicable to moderately severe hearing loss;4.. Low noise, small distortion;5.. Easy to wear. 6.Taken the maximum saturation pressure level: 135 db or less7.Taken the full file to gain: p 45 db8.Taken the harmonic distortion: f < 10% 1000 hz or less9.F > 10% 1000 hz or less10.Taken the frequency response: 400 hz -3500 hz11.Taken the equivalent input noise: 32 db or less12.U working voltage: 1.5 v13.U working current: < 6.8 mA
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