Keychain set featuring the characters from First Gundam and their companions. - Characters: Gundam - Characters: Old Zaku - Characters: Acguy - Characters: Gyan There's a button on the back, and the mono-eye used to light up, but the batteries have been removed and it doesn't light up anymore. It might work if you put in button batteries, but please understand that it's not guaranteed to work. The item is from 27 years ago, as it's stamped with the year 1998. Thank you for viewing.