Ear Back Hearing Aid USB Rechargeable Hearing Aid 、hearing aids for senior

Hearing Aid   Product Features   1. Compact and lightweight   The length of the product is only 4.2cm and the weight is only 8 grams. It is invisible to wear, comfortable to wear, and has no sense of weight. Wearing it will not cause fatigue.   2、 ultra-long battery life.   Cyclic charging, eliminating the need to frequently buy and replace button batteries. Fully charged can be used 40H, long battery life, there will be no product power shortage of use anxiety.   3、 left and right ear universal.   The curved hook of the ear can be rotated 360 degrees, and can be used for both left and right ears.   4. Dual mode switching   L mode is suitable for quiet environments, while H mode is suitable for noisy environments. Choose the appropriate mode according to your needs and intelligently eliminate environmental noise.   After-sales warranty service:   Purchase Hint   Improper operation may lead to screaming.   Solution:   1、When wearing the device, your hand accidentally touches the sound receiving port, causing the sound to repeatedly amplify, resulting in whistling sound. Therefore, before attempting to wear it, please turn off the device and reduce the volume to the lowest "1". After wearing it steadily, restart the device to adjust the volume.   2. 、If the earplugs do not fully fit the ear canal, they will make a howl. Before wearing the device, test the size of the earplugs, choose the appropriate earplugs, and ensure that they fully fit the ear canal without any gaps.   3. By following the correct debugging method, ideal sound effects can be obtained. 1. Choosing appropriate earplugs can easily press into the ear canal without loosening, indicating that the earplugs are suitable. 2. Adjust the volume to the lowest level "1". Confirm if the device is in a shutdown state. Wear it when turning off the device, firmly wear it, and then turn it on to adjust the volume. To adjust the volume, it is necessary to refer to the normal speaking voice of others. The voice should gradually increase from the lowest level until normal conversation can be heard. The sound should not be adjusted too loudly. Be sure to refer to the voice of others speaking, not your own voice or the voice of a music player.