The Trakcell Bluetooth Thin Smart Wallet Tracker Card Item Finder in Black is a waterproof device that uses Bluetooth connectivity to help you track your belongings. It includes a battery and is designed for use by men. The item dimensions are 4.8 x 3.6 x 0.4 inches, and it weighs 1.58 ounces. It is a slim and lightweight tracker card with special waterproof features.