Stamped Stainless/Injection Molded Nylon. Input 12V-24V, Output DC 5V/2.1A. Fits all Sea-Dog Line Power Sockets. Output for each outlet is 2.1 Amps ? enough to charge iPhones, iPads, and almost all other devices. Portable version fits into any standard receptacle and can be used on a boat or in a car or anywhere there is a receptacle.