Digital In Ear Hearing Aids Wireless Ear Aids for Elderly Moderate to Severe Loss(Silver)

1. Material: ABS 2. Output power: 5mW 3. Sound gain: 50+/-6dB 4. Harmonic distortion: less than or equal to 10% (1000 Hz) 5. Equivalent input noise level: less than or equal to 30dB 6. Speaker impedance: 180 ohms 7. Input voltage: 1 battery (1.5 v / AG3 x 1) battery 8. Working current: 5mA 9. Frequency range: 200--4000 Hz