Size: 9in x 6in Celebrate your birthday with Transformers in their own exclusive Transformers Sound Card. Transformers are Scientific characters that come from the planet Cybertron. On the cover of this Talking Sound Card with Optimus Prime, the leader of the Autobots reads "It's Your Birthday Get Ready!...to Transform. Happy birthday". As this is a Talking birthday card, Optimus speaks a phrase in his formidable voice. This birthday sound card of Optimus Prime is a must buy for the Transformers fan and comes with envelope.