GLIDiC SB-WS74-MRTW/GD GOLD GLIDiC Sound Air TW-7100 GOLD I have only checked for initial defects. As a result, the battery percentage display on the earphones drops and returns in increments of 10% in about 20 minutes, but it seems that normal use is possible. I suspect battery degradation or a malfunction, but I was able to use them continuously for 6 hours. I have judged that these can be used without problems for everyday use, and I am listing them as "Like New". Only those who understand this, please. Smooth, heavy, and luxurious aluminum case. A beautiful design with an elegant matte and metallic contrast. Brand: GLIDiC Color: Champagne Gold Ear Placement: In-Ear Headphone Type: In-Ear Model Name: GLIDiC Sound Air TW-7100 Connectivity Technology: Wireless Comfortable Fit: Unique earphone shape supervised by "Canal Works". Furthermore, two types of ear tips are included. Equipped with an external sound capture function that allows you to take in ambient sounds while wearing the earphones. Tile function to find earphones: Even if you lose your earphones, you can find them with your smartphone *Requires installation of the dedicated app "Tile" (free) Bluetooth Supported Standards: Version 5.0 (Supported Profiles: A2DP, AVRCP, HFP, HSP) Supported Codecs: SBC, AAC, aptXTM