This is a Strawberry Prince (STPR) penlight. I used it twice at a live concert. It was working fine at first, but now there's a bug where it turns blue no matter which button you press. Please be aware of this before purchasing. The batteries will be removed before shipping. Search terms: Penlight, ring light, penra, rinrai Strawberry penlight, Sutopuri, STPR Goods, Riinu-kun, Colon-kun, Root-kun Jel-kun, Satomi-kun, Nanamori. Riinu, Root, Colon, Satomi, Jel strawberry prince Live, live tour, penlight