This is a keychain of Assassination Classroom's Koro-sensei. It lights up when batteries are inserted, but can be used as is. However, it doesn't currently light up because the batteries haven't been replaced. It might work if you replace the batteries. Please be aware that you will need to put in new batteries upon purchase. I bought this a long time ago, but it has been stored as new. Instant purchase OK ⭐︎ Please refrain from purchasing if you are looking for perfection, as it is stored by a private individual. Assassination Classroom Koro-sensei Keychain