Listen to the sound clip Calling All Bots from Optimus Prime Soundboard: Calling All Bots Calling All Bots This sound is from Optimus Prime Soundboard OPTIMUS PRIME is is the fictional commander of the main protagonist group in the Transformers. He is the largest, strongest, and wisest of all Autobots. Check out his clips here Transformers fans! Go to the full soundboardwith more sound clips Search