Group Name: SEVENTEEN I've used this twice at live concerts, but have kept it stored since then. Please note that due to the passage of time, there is some slight yellowing on the string and some deterioration of the instruction manual. ・Batteries are not included. ・No issues with Bluetooth or lights during use. I'm now supporting a different group, so I'm listing this in the hopes that it will go to someone who loves it *\(^o^)/*