Tips for buyers:
The cause of howling/noise: To make a small size hearing aid, the internal amplifier and the microphone are close to each other. The sound is continuously received and extended, so it has a certain possibility of producing howling after power-on. At present, small hearing aids and high-power hearing aids on the market can hardly prevent howling, and only full-digital hearing aids can prevent howling.

Ways to avoid howling/noise:
1. When the power is high (the amplified sound is large), howling is more likely to occur. Therefore, gradually increasing the volume of layer can effectively prevent howling.
2. When the ear canal is completely closed, there is no howling sound. So, please use hearing aids after cleaning your ear canal, and test the ear tips from largest to smallest to find the most suitable ear tips.
3. After the hearing aid enters the ear canal, it is recommended to push the hearing aid with your fingers and hold it for 1-2 seconds, and then release it completely from the earplug.

In addition: If you don't know how to use it or there is a problem with your hearing aid, please don't rush to leave a negative review and contact us. Thank you.

Description

Hearing aids can effectively reduce noise and amplify sound. Our accessories include earplugs of different sizes. You can choose according to your ear size. This small device allows you to wear comfortably and provide a clear sound.

Specifications
Product name: Hearing Aid
Power mode: rechargeable
Maximum saturation sound pressure level (SSPL): 130dB±4dB
Total acoustic gain: F = 1600Hz, 45±5dB
Total harmonic distortion (THD): F > 1000H 15% F < 1000H 10%
Frequency response: 450-3500Hz
Equivalent input noise: 32 dB
Battery: rechargeable
Battery current consumption: 4 mA
Estimated battery life: 48 hours

Rated voltage: DC 1.5V

Packing list:

1 * Hearing Amplifier
1 * Cleaning brush
4 * Earplugs
1 * USB cable

1 * Instructions

Ways to avoid Whistling /noise:

Whistling is common for small amplifiers and is known as "Feedback".it is caused by amplified sound from the hearing aid getting back to the micropphone and being re-amplified.The folloring tips will help reduce the occurrence of feedback whistle:

1. Reduce the volume. Turn off or lower the volume before inserting the instrument in your ear.

2. Securely position the instrument into your ear. Once the hearing aid is properly seated in your ear,the whistling will generally stop.

3. Clear the ear canal of wax or debris. Check your ear with help.

4. Change the ear piece or tubing Change a new one or a different size one.the appropriate choice of earplugs and plugged,Make sure the tubing is not broken or torn.