This is a Tamagotchi that my child used when they were little. I reset it before listing it. It was stored in a closet for over 10 years, and they recently wanted to use it again, so I took it out and used it for about a month. The exterior has many scratches because it was used by a preschooler back then. The strap is also dirty, and the keychain is faded. In terms of functionality, I don't think there are any noticeable malfunctions, but sometimes the middle button feels a little unresponsive while playing the game. I'm not sure if it's because of how I was pressing it. However, it doesn't cause any major problems. I think it's rare to find one with the strap and keychain. For safety reasons, batteries are not included. It uses two AAA batteries. I was using it until the end of last year, but it's over 10 years old, so I cannot provide any warranty after purchase. Please understand this fully before purchasing.