Try this if you notice hearing loss! Olive Smart Ear Plus Olive Smart Ear Plus, gently used, in excellent condition Charging storage case type, can be used as Bluetooth earphones, and doesn't look like a hearing aid when worn. Usage: Used for about six months after purchasing new. I used it comfortably in conjunction with the smartphone app. There are no functional problems within the range I used it. Notes: There is no instruction manual, but please check https://manuals.plus/ja/olive/union-smartear-plus-manual [Other] Accessories: USB cable / 5 pairs of ear tips (10 pieces) / Box The following is a summary of the manufacturer's description. High sound collection and accurate output adjustment function Sound collection power to reliably catch conversations Unique voice algorithm and high-performance voice recognition engine Carefully recognizes each word of the other person's voice, realizing natural hearing Sound collection power to reliably catch conversations No need to replace batteries, rechargeable and hassle-free Water-resistant for everyday life The case can also be charged, so you don't have to worry even on a day out Howling suppression function A small body that achieves high sound collection power, a design that fits various scenes Design developed based on ergonomics You can adjust the sound yourself with the sound adjustment app "My Olive" One-touch sound mode switching according to the scene Fine adjustments are also possible by raising and lowering the volume bar You can customize the sound to your liking, such as the sound that suits your usage scene Check your hearing condition with the "Sound Adjustment Test" installed in the app