USB Charging Mini In-Ear Elderly Hearing Aid Stealth Sound Amplifier(Red and Blue)

1. Sound output: 124-134dB
2. Sound gain: 26-36dB
3. Total harmonic distortion: 3%
4. Frequency range: 300-3500MHz
5. Input noise: 32dB
6. Voltage: 1.5V
7. Current: 2mA
8. Charging box battery capacity: 300mAh
9. Charging box size: 7 x 7 x 3 cm
10. Hearing aid size: 1.2 x 2.4 cm
11. The charging box can be charged 5 times, extending the working hours of the hearing aid for 250 hours