Giga Pets Tech T-Rex Digital Virtual Dinosaur Pet Toy, Red, Collector?s Edition Brand New in Box Keychain attachment Naming feature stores up to 5 letters so you can personalize your pet Real t-rex sounds Multiple stages of development so you can watch your pet grow New evolution animations Uses 1 CR2032 Battery. Battery not included Name your pet, tame your pet, and play games with your pet. Just like a real pet you have to feed, clean, and train your pet. Tons of activities to do with your interactive pet; like, playing games, or teaching your pet tricks. Take it with you anywhere! Attach the keychain to your bag. Ages 5+.