This is a LUMIACE 2 penlight by Kiyoshi Ryujin 25, with a color-changing function. I purchased it about 10 years ago, when the group first formed, at Club Quattro in Nagoya. I've only used it twice, and its operation has been confirmed. *Batteries are not included.* - Model: LUMIACE 2 - Function: Color changing Thank you for looking. Available for immediate purchase.