How to use: Simply insert the Arc Cubes into compatible DX toys like the DX Arc Riser or DX Arc Eye Sword to activate cool transformation and special move sounds. The Ultraman Arc cube (SG Ver) has a unique extra sound, so enjoy that special moment. Note: Keep the cubes away from small children who might swallow them. Avoid exposing the cubes to extreme heat, cold, or moisture as it could damage the internal components. Maintenance: Wipe the cubes gently with a dry cloth if they get dirty. Don't use harsh chemicals or abrasive materials. That way, your Arc Cubes will stay in great shape for a long time.