Adjustable Mode:You can choose different frequency modes and volume to ensure that you can hear clear sound in different volume environments. Comfortable volume, easy to wear anytime, anywhere Noise Reduction Function:The newly upgraded smart chip, the noise reduction function is very good. It sounds more natural and provides you with a wonderful experience. Excellent sound quality and comfortable listening. Suitable for all kinds of people with poor hearing, the angle of the earplugs can be adjusted, suitable for left and right ears Safe and Comfortable Hearing Aids:Hearing aids for seniors are made of the latest materials, the shell is nano-coated, waterproof and sweat-proof; material domes of different sizes are suitable for everyone, and equipped with cleaning tools to extend the service life; very small, very suitable for your ear canal. People FCC, ROHS certification, no radiation and harm to human ears RechargeableMiracleHearing Aist:The sound amplifier is fully charged for about 2 to 4 hours, and it can be used for about 80 hours. Put it in a small box, which is easy to carry and go out. Hearing aids for adults allows you to easily communicate with others and provide a booster for your better life Specifications: Type: Hearing aid Product Size: 0.65x0.44 x1.69 inch Weight: 0.19 lb Max. saturation sound preure level (SSPL):130dB±4dB Full on Acoustic Gain: 45±5dB Total Harmonic Distortion (THD):F>1000H 15% F