Vintage handheld game
Tested, works great. Comes with working batteries
Manufactured in 1995
Found this description online:
Lights Out is a popular puzzle game, originally a handheld electronic device by Tiger Electronics, where players press buttons on a grid to turn off all the lights, with each press toggling the button and its adjacent neighbors. The goal is to solve the puzzle in the fewest moves, with variations including different grid sizes (like 5x5 or 6x6) and modes like "Lit Only" or "Toggle". The game's mechanics, based on toggling lights in a pattern, have inspired other games and are solvable with linear algebra.