This is a high-performance digital hearing aid for both left and right ears, designed for people with hearing loss. It can amplify sound up to approximately 28 times and is suitable for a wide range of hearing loss, from mild to moderately severe. It weighs only 8g, making it ultra-lightweight, and its ergonomic design makes it comfortable to wear for extended periods. It uses readily available dry cell batteries, making it very convenient for use on the go. A single battery replacement allows for up to 400 hours of use. It features 4-level adjustable volume and a skin-tone color that is familiar to Asians, making it less noticeable. It is equipped with noise and feedback suppression functions. It is necessary to adjust the settings to match the user's hearing. Immediately after starting to use it, it may be difficult to completely filter out only the necessary voices and sounds, and you may feel uncomfortable, such as hearing all sounds loudly. It usually takes about 3 months for the brain to get used to these sounds, so please adjust the volume and sound balance until then. Stage 1 (1-3 weeks) Use for 1-2 hours a day. It is recommended to use it in a relatively quiet environment, adjust the volume, and practice while relaxing. Stage 2 (1-3 weeks) Use for 4-8 hours a day, go out to a quiet environment, listen to the surrounding sounds, and improve the resolution of your hearing, making the sounds you hear clearer. Stage 3 (1-3 weeks) Can be used for extended periods. When entering public places, adjust the volume to a comfortable level, and you can talk to friends and strangers. Stage 4 (1-3 weeks) You can travel, go to shops and restaurants, attend concerts, watch videos, do what you like, and experience all the sounds again. Product Specifications Body size: 5.3 × 0.8 × 1.5 cm Body weight: 8g Compatible batteries: LR44 Set Contents Main unit × 1 Ear plugs × 3 types Test batteries × 2 ※The included button batteries are for testing purposes only. Please prepare commercially available batteries separately for use. ※For noise prevention, please wear the earplugs at the correct angle and use the appropriate volume. ※To keep the price down, we will ship using an inexpensive shipping method with thickness restrictions. It will be delivered in an envelope without cushioning material. ※Due to working a second job, it may take up to 4 days. Please understand. Hearing loss, hearing impairment, sign language F-138