The “Vital Bracelet Characters Ultraman Set” comes from the “Vital Bracelet” series of wearable LCD toys that allow you to develop and evolve your character based on your heart rate and steps. This product has a built-in NFC chip, which enables auto-battle by touching an NFC-equipped smartphone that is in a state to emit radio waves through an app or other means, or IC devices such as card readers in the city. You can also use the dedicated app “Vital Bracelet Characters Lab” to manage the characters you have developed. Includes “VBM Card Ultraman Tiga”, a VBM card containing the evolution line of Ultraman Tiga and his derivatives. By inserting a VBM card (sold separately), you can also change the characters you have developed. The Vital Bracelet Characters is the same as the one included in the Vital Bracelet Characters Kamen Rider Set scheduled for release in December. The Vital Bracelet Characters is the same as the Vital Bracelet Characters included in the Vital Bracelet Characters Ultraman 55th Edition and Vital Bracelet Characters Kamen Rider 50th Edition. ***The arm circumference is 160-210mm. ***The VBM card is not guaranteed to work with the Vital Bracelet Digital Monster and Vital Bracelet Digivice V-. ***The VBM card is not compatible with the Vital Bracelet Lab application.