【Easy Operation with Smart Auto ON/OFF Function】No complicated operations are required. This hearing amplifier 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. There's no need to press any troublesome operation buttons, providing a simple and intuitive user experience. *Please be careful not to cover the microphone hole during use (to prevent feedback). Manual power ON/OFF is also possible by pressing and holding for 3 seconds. 【One-Touch 4-Level Volume Adjustment】Easily adjust the volume with a light touch, offering 4 levels of adjustment. Confirmation sounds will play during operation, and the number of beeps indicates the current volume level. 【230 Hours of Long-Lasting Battery Life, Significantly Reducing Charging Hassle】This rechargeable hearing amplifier features a power-saving design. A full charge provides up to 20-30 hours of use, fully covering your daily needs! The included charging case (built-in 1200mAh battery) provides an additional 200 hours of charging! This results in a total of up to 230 hours of ultra-long use, reducing the number of annual charges by 72% and freeing you from the hassle of charging! The remaining charge of the charging case is clearly visible with green numbers. 【Ultra-Lightweight Design at Just 3.5g for Comfortable Wear】Achieving a weight so light you'll forget it's there, the ergonomic design ensures your ears won't tire even after all-day use. 【Discreet, Comfortable, and Unobtrusive】The natural design is inconspicuous, and it won't interfere with glasses or masks, making it suitable for various everyday situations. *By selecting the perfect size ear tips from the included set, you can achieve an even more comfortable fit. Set Contents: Main unit, charging case, ear tips (S/M/L), cleaning brush, Type-C cable, Japanese instruction manual 【Precautions for Use】When using the hearing amplifier, an adjustment period for your ears is necessary. Always start with the minimum volume. As your ears adjust, gradually increase the volume. It is recommended to start with about 1 hour of use per day and gradually extend the duration to suit your most comfortable state. Do not use if you have any ear abnormalities or discomfort, such as otitis media or otitis externa. If you experience hypersensitivity to sound (e.g., sounds are excessively loud or cause ear pain), discontinue use immediately.