Hearing Aids Invisible Rechargeable Hearing Amplifiers

Max sound output:118±3dB Sound gain:≥35±5dB Total harmonic wave distortion: ≤5% Frequency range: 300-4500MHz Input Noise:≤32dB Voltage: DC 1.2V Current:≤5mA Main unit, Charging 2~3 hours for 20 hours use Charging case 90 mins for hearing aids charging 5 times