During time, there've been several improvements that have generated the development of more efficient tools like the AC adapters and mains transformers that have become extremely popular among customers because of their economic and applicative advantages. 12vAdapters.com : AC/DC Power Supply Adapters for Electronic Devices. All of our adapters are high quality regulated power supplies, stable enough for the most sensitive electronics. Ideal for LCD screens, Digital Media, Audio and Video applications, Scanners, Hard Drives, or any other device that requires high quality stable DC power. Same Day Shipping: Order before 1 PM Eastern time and your order will ship same day! We Stand Behind Our Product: One Year Warranty on All units!