SLIM DESIGN: Unlike a leather wallet, Atomic Charge Wallet has a slim and lightweight unisex design fits in a purse or pocket perfectly for travel. You can use it as a men’s wallet or women’s wallet. DURABLE CONSTRUCTION: The interior boasts an accordion design acts like a card holder that holds folded cash, your credit card, and more. The metal exterior houses an external battery and is super durable. WALLET WITH BATTERY: Atomic Charge Wallet is like a power pack for your phone. It has a rechargeable 2500 mAh battery. Includes Atomic Charge Wallet and mini USB cable SAFE: Charging wallet with battery pack protects your sensitive information with RFID-blocking technology.