The iMac's processor has been upgraded and now houses a 7th-gen Kaby Lake 3.0 GHz Intel Core i5 Quad-Core processor that can be overclocked up to 3.5 GHz, as well as 8GB of 2133 MHz DDR4 RAM. Visuals are powered by a dedicated AMD Radeon Pro 555 graphics card with 2GB of vRAM, and for storage, there is a 1TB 5400 rpm hard drive.
Outfitted with 802.11ac Wi-Fi and backwards compatible with 802.11a/b/g/n for speedy hook-ups to your home network, this iMac is also configured with Bluetooth 4.2, as well as a UHS-II SDXC card slot, two 40 Gb/s Thunderbolt 3 ports, four 5 Gb/s USB 3.0 Type-A ports, a Gigabit Ethernet jack, and a FaceTime HD camera. It also has a Kensington lock slot for added security.
Apple's 21.5" iMac with Retina 4K Display (Mid 2017) operates using 100-240 VAC at 50-60 Hz and includes an Apple Magic Keyboard, an Apple Magic Mouse 2, a Lightning to USB cable, and a power cord. The installed operating system is macOS Sierra, and protection is provided by a limited 1-year warranty, which can be extended using AppleCare.