Popular USB Rechargeable In-Ear Hearing Amplifier ■ Product Features 【High-Performance Digital Hearing Amplifier】 ・Uses high-grade medical-grade silicone ・Maximum acoustic gain of 30dB or more ・Suitable for both ears ・Fully charges in 2 hours 【Experience the Best Comfort】 ・Ergonomic design provides a comfortable fit ・High-grade medical-grade silicone is gentle on the skin ・Adjustable fit with 4 earplugs ・Ultra-lightweight at 3.9g for comfortable wear ・Resistant to sweat and water, easy to wipe clean 【Up to 8 Hours of Continuous Use】 ・High-performance hearing amplifier that can be used all day ・Easy charging by simply plugging into USB ・No need to replace batteries, making it hassle-free ■ How to Use 1. Turn the volume to the minimum. 2. Turn the power ON. 3. Put on the hearing amplifier. 4. After wearing, increase the volume. 5. After use, remove the hearing amplifier and charge it. 【Note】Since the hearing amplifier is a special electronic product, a slight electrical current sound may be heard when starting up, but this is a normal phenomenon and does not indicate a problem with the product's quality.