I received this as a prize a few years ago and have never used it. I opened it once to check the operation. Although I haven't used it, the charging cable has discolored slightly due to long-term storage. However, it works without any problems. Returns are not accepted. Thank you for your understanding. ＜Product Specifications＞ Bluetooth: Version 5.0 Supported codecs: AAC, SBC microSD maximum capacity: 16GB (FAT32 format) Battery type: Li-ion battery (18650) Weight: Approximately 238g Size: Approximately W80 x H225 x D80mm Battery capacity: 800mAh Charging time: Approximately 2.5 hours Maximum usage time: Approximately 3 hours Material: Aluminum alloy (handle), ABS Operating temperature range: 0℃-50℃ Model number: FG-WS858-SET JAN: 4589490375042