【Easy Operation with Smart Auto ON/OFF Function】No complicated operations are required. This hearing aid automatically turns on 8 seconds after being taken out of the charging case and placed in the ear. After use, simply return it to the case, and it will automatically turn off and begin charging. The orange light illuminates during charging and turns off when fully charged. The remaining charge of the charging case is clearly displayed with green numbers. *Please be careful not to cover the microphone hole when using (to prevent feedback). Manual power ON/OFF is also possible by pressing and holding for 3 seconds. 【One-Touch Volume Adjustment, Amplification up to 35dB】This hearing aid is designed for easy operation, even for the elderly. You can adjust the volume in 4 levels by simply pressing the volume adjustment button, and you can check the current volume level by the number of beeps. We recommend starting with the minimum volume. Equipped with a high-sensitivity noise-canceling chip, it is designed for those with mild to moderate hearing loss. 【Please Read Before Purchasing】Regarding the characteristics of the hearing aid, "selective amplification" is not possible, so environmental sounds (vehicle noise/wind noise/everyday sounds, etc.) will also be amplified, not just conversational voices. Please use it in a quiet room. 【Amazing Long Battery Life! Peace of Mind Even When Out and About】The hearing aid can be used continuously for 20-30 hours on a full charge, allowing you to use it all day long with peace of mind. The orange light illuminates during charging and automatically turns off when fully charged, so you can see the charging status at a glance. Furthermore, the included 1200mAh large-capacity charging case can provide an additional 200 hours of charging! You don't have to worry about running out of battery when you're out. The remaining charge of the charging case is immediately visible with a green number display, so you don't have to worry about sudden battery depletion. Comes with a Type-C charging cable! No need for troublesome battery replacements. 【Only 3.5g! Ultra-Lightweight Design】Achieving a feather-light feel, this ultra-lightweight design weighs only 3.5g. It minimizes the burden on your ears even during long hours of wear. 【Natural Fit for All-Day Comfort】This in-ear hearing aid is so compact and natural in design that it's hardly noticeable to others, making it easy for first-time users to use without hesitation. It doesn't interfere with glasses or masks, providing a comfortable fit. The unique ergonomic curve fits perfectly to the shape of the ear, reducing discomfort even after long hours of wear, and you don't have to worry about it falling off during daily activities such as walking or housework.