New A39 Skin Color To The Ear Charging Old Man That Sound Collector Hearing Aid Earphone Hearing AidFeatures: 1. Max sound out put: 117+ 3dB 2. Sound gain:>= 25dB+ 5dB 3. Total harmonic wave distortion:<= 7% 4. Frequency range: 400 4500MHz 5. Input Noise:<=32dB 6. Voltage: d. c. 1. 2V 7. Current:<=6mA 8. Main unit, Charing 2 hours for 12 hours use 9. Charing case 90 mins for hearing aids charing 3~4 times
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New A39 Skin Color To The Ear Charging Old Man That Sound Collector Hearing Aid Earphone Hearing Aid