The Apple iMac G3 400MHz is a vintage all-in-one desktop computer released in 1999. It features a PowerPC G3 processor with a graphics processing type of dedicated graphics, suitable for casual computing. The computer has a 15-inch screen, 64MB RAM, and a 6GB hard drive capacity. With a colorful blue design, this retro computer also includes an optical drive and built-in speakers, making it a nostalgic piece for collectors of vintage Apple products.