Hanging Neck Hearing Aids Old People Voice Amplifier In-ear Hearing Aid Headphones(Black)

1. Material: ABS2. Battery capacity: 150mAh3. Charging time: about 3H4. Use time: about 40H5. Frequency response range: 450-3000Hz6. Saturation sound pressure level: within 129dB7. Output sound pressure level: about 120dBFeatures:1. Digital channels, multiple noise reduction, automatically adapt to ambient noise, multi-channel processing noise, not afraid of howling, comfortable to wear, hear more clearly2. Smart chip, automatically adapt to the environment, high-definition sound quality, suitable for use in various situations3. USB interface charging, convenient and fast, can be used repeatedly4. With a charging indicator, the indicator light is red when charging, and the fully charged indicator is not bright5. Silicone earplugs, comfortable to wear, with large/medium/small 3 pairs of silicone ear caps