PRODUCT DESCRIPTION
1.100% Brand new and high quality
2.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 less
7.Taken the full file to gain: p 45 db
8.Taken the harmonic distortion: f < 10% 1000 hz or less
9.F > 10% 1000 hz or less
10.Taken the frequency response: 400 hz -3500 hz
11.Taken the equivalent input noise: 32 db or less
12.U working voltage: 1.5 v
13.U working current: < 6.8 mA
