Fast to get your white balance setting right and help you catch the fantastic moments in a short time. | Designed and Produced strictly Extract neutral 18% exposure, Quality Guarantee. | Compact, Sturdy and Lightweight, Super Easy to Use. Same Size as Credit Card. Small but useful! | Set includes 3 Portable Compact Color Calibrated cards, Premium Lanyard. | 100% Satisfaction guarantee - 30 days money-back guarantee and 12 months warranty. Please do not hesitate to contact us if you have any questions about the cards.