Best Digital Hearing Aid BTE Adjustable Tone Sound Amplifier Portable Deaf Elderly digital Hearing Aids

Specification：

• Product material: plastic

• Noise reduction rate: ≤ 28 (decibels)

• Product function: help hearing

• Output power: 3.6mW

• Maximum sound output: 120 +/- 3dB

• Sound gain: ≥30dB+/-5dB

• Frequency range: 450-4500MHz

• Equivalent input noise:≤30dB

• Harmonic distortion:≤10%

• Continuous working time:≥20 hours

• Battery capacity:40mAh battery is rechargeable battery

• Working current:≤2mA

• Operating voltage:DC 1.2V

• Speaker impedance:110 Ohm

• Charging time:2~3 hours