The first model—the 22-inch Apple Cinema Display—was introduced in September 1999 alongside the Power Mac G4 and used DVI for video input. It was enclosed in a high-density plastic frame with an easel-style stand and had a display resolution of 1600 x 1024. This model was upgraded in July 2000 with the Apple Display Connector (ADC), which ran DVI, USB, and 25V power through a single connector. It was eventually replaced by a 20-inch model on January 28, 2003 that sported a widescreen display with up to 1680 x 1050 resolution.