A system and device for adding electronics to materials of a wallet to form a smart wallet. A smart wallet stows and retrieves information stored or displayed on various transaction cards and other information typically carried within the wallet. Electronic and physical features of a smart wallet include devices and techniques for attaching electronics to accessories, and also for attaching accessories, to primary devices to form a smart wallet. The user can then interact with the smart wallet and its cards, information and accessories using an interface that governs that interaction while retaining the security of the information. Mechanical features include techniques for integrating electronics within materials to add electronic functionality to make any device a smart wallet. Several accessory styles and devices for attaching same to electronics are also disclosed.