Brand: Sony Model: WI-C100 Color: Black Connection Type: Bluetooth Charging is USB Type-C. Operation confirmed. Equipped with "DSEE" which reproduces the high frequencies of compressed audio sources clearly. Compatible with the dedicated app "Headphones Connect" (Allows you to customize the sound quality to your liking) IPX4 equivalent water-resistant performance, resistant to sudden rain and sweat. Lightweight body of approximately 20g and a well-balanced shape around the neck. 360 Reality Audio certified model. Convenient features when connecting to Android devices. Easy connection to Windows PC. With microphone function. Bluetooth version: Bluetooth 5.0 Awarded the Ongen Shuppan Bluetooth In-Ear Headphones Award Please check the photos for scratches, etc. Since this is a used item, there may be some battery degradation. However, there were no particular problems with the battery during normal use.