Used for about two and a half years, from August 2022. Operation confirmed. When shaken, it makes a rattling sound. I'm not sure if any parts are damaged inside, but I've been using it normally for several months without any problems. It was very easy to use and I cherished it. It was the best hair dryer I've ever had, but unfortunately, I'm selling it because it's too heavy for my child to hold. Used item, please consider before purchasing. ↓ Product Description Fast drying with Panasonic's maximum air volume*1. Ionity's first, equipped with double mineral negative ions*2. *1 As of October 2021, for Panasonic hair dryers *2 Mineral negative ions are negative ions generated from a discharge unit containing a zinc electrode. ■ Powerful drying with Panasonic's maximum air volume of 2.0m3/min*3 and a quick-drying nozzle. *3 Without nozzle attached ■ External, double mineral negative ions*2 to protect from the heat of the hair dryer. *2 Mineral negative ions are negative ions generated from a discharge unit containing a zinc electrode. ■ Warm and cool twin flow to smooth hair flow and create shiny hair.