JBL TUNE FLEX GHOST Silicone case for the charging case. Color: White The JBL TUNE FLEX GHOST is made of plastic and is easily scratched, so using a silicone case increases the likelihood of keeping it in good condition. It fits very snugly and has a carabiner attachment, making it stylish. The market price on Mercari is around 3500 yen. Connection type: Wireless Features: Noise canceling