The Data Cuff is designed to work with the Scope Dope Data Card but can easily accommodate any 5 x 2.5 inch card. Access important data quickly like Call signs, phone numbers, 9 Line MEDEVAC Request, key road points, or just about any information needed in a moments notice. Lightweight and durable, it offers silent one-handed operation. One size fits all. Lifetime Warranty. Made tough in Canada by an American!