The late 2015 Apple 21.5 iMac measures at just 5 mm at its edges which is 40% less volume than the 2011 iMac. The 21.5 widescreen display features LED backlighting for vibrant accurate color. With in-plane switching (IPS) technology the iMac has a wide 178° viewing angle. The screen has a 16:9 aspect ratio and Full HD 1920 x 1080 native resolution supported by integrated Intel HD Graphics 6000. The iMac houses a 5th-Gen Broadwell 1.6 GHz Intel Core i5 Dual-Core processor with 8GB of 1867 MHz LPDDR3 onboard RAM. For storage the iMac has a 1TB 5400 rpm HDD. Outfitted with 802.11ac Wi-Fi (backwards compatible with 802.11a/b/g/n) for the speediest hook-ups to your home network this iMac is also configured with Bluetooth 4.0 as well as an SDXC card slot for extra storage four USB 3.0 ports two Thunderbolt 2 ports and a Gigabit Ethernet (RJ-45) jack. It also has a Kensington lock slot for added security.21.5-inch (1920 x 1080) IPS DisplayIntel Core i5-5250U Processor (Dual-Core 1.6GHz 3MB Cache)8GB DDR3 Memory1TB (5400RPM) SATA Hard Disk Drive (HDD)Integrated Intel Iris Pro Graphics 6000No Optical Drive4 x USB 3.0 2 x USB-C 1 x Microphone-inWireless Keyboard and Wireless Mouse1MP Webcam10/100/1000 Gigabit Ethernet IEEE 802.11ac and Bluetooth 4.0 + HSOperating System: Apple Mac OS X 10.1117.7 x 20.8 x 6.9 (HxWxD); 12.5lbsEnergy Star Compliant