This is a booster pack to be used with the Vital Hero Batman™ Interactive Band (sold separately). This Vital Hero Memory Card Set includes one Heroes VHM Card, and one Villains VHM Card. The VHM card contains a level-up route to unlock over 15 different characters. Store up to three characters in your Vital Hero Band at once. Each VHM card offers different attributes that will change the character and help you win battles based on your opponent.