I've used this for about a month. It has been disinfected with alcohol and stored in a dark place. This is a single-ear type, so if you purchase another one at the same time, I will sell them for 13,000 yen. Operation confirmed. This is a rechargeable hearing aid that fits over the ear, capable of amplifying sound up to 30 times. - Model Name: Rakuchin Hearing SK-05 - Type: Rechargeable hearing aid - Maximum sound amplification: Approximately 30 times - Features: Over-the-ear type - Accessories: Charger, instruction manual Thank you for looking.