About the product1. Unique design allows easy access to all functions without having to remove the skin 2. Lightweight, sporty and stylish unique design 3. Soft, comfortable, and adjustable strip armband 4. Soft and durable lycra material 5. Exquisite making, luxurious color, makes your device unique 6. This durable, lightweight armband case keeps your cell phone secure and protected 7. Internal Size: 16.2 x 8.8cm 8. It contains a button battery