Hearing Aids With Digital Display Charging Case Noise Cancelling Invisible In-Ear Sound Amplifier...

1. Wireless invisible hearing aid designed specifically for people with mild to moderate hearing loss, balancing discretion with clear sound quality, offering comfortable wear and simple operation.
2. Smart magnetic on/off control: Automatically powers off when placed in the magnetic charging case; ready to use immediately upon removal, eliminating manual operation.
3. Knob volume adjustment + Transparent pull cord for insertion/removal: Includes an adjustment tool for fine-tuning volume; transparent pull cord design facilitates quick device retrieval.
4. Magnetic charging case: Provides up to 100 hours of extended battery life. When fully charged, the hearing aid battery lasts approximately 20 hours. Charging time is 3 hours.
5. Tubeless and cordless design for comfortable wear: No external tubes or wires; does not interfere with glasses, masks, or hairstyles; includes multiple sizes of silicone ear tips.

Parameters:
1. Max OSPL90: 110 +/- 4 dB
2. High-frequency average OSPL90: 106 +/- 2 dB
3. Full-on gain: 34 +/- 2 dB
4. Average gain: 28 +/- 2 dB
5. Equivalent input noise: 22 +/- 2 dB
6. Frequency bandwidth range: F1 less than or equal to 500 Hz, F2 less than or equal to 5000 Hz
7. Total harmonic distortion: less than or equal to 3%

-Laboratory test data are for reference only; actual products may vary.