Chelsea Online

Processor Intel Core i5 Quad Core 3.1GHz Turbo Boost up to 3.6GHz Memory 8GB of 1867MHz LPDDR3 onboard memory Hard Drive 1TB (5400-rpm) hard drive Optical Drive None Software Operating System: OS X El Capitan Engineered to take full advantage of your Mac hardware, OS X El Capitan is designed to be as easy to use as it is beautiful to look at. It comes with an amazing collection of apps you’ll use — and love — every day. And it enables your Mac and iOS devices to work wonderfully together. Display 21.5-inch (diagonal) Retina 4K display   IPS technology Resolution 4096 x 2304 Support for millions of colours Graphics Intel Iris Pro Graphics 6200 Audio Stereo speakers Dual microphones 3.5mm headphone jack Headphone/optical digital audio output (mini-jack) Support for Apple iPhone headset with microphone Input Devices Apple Magic Keyboard Apple Magic Mouse 2 Networking Wi‑Fi wireless networking Bluetooth 4.0 wireless technology 10/100/1000BASE-T Gigabit Ethernet (RJ-45 connector) Power Supply Line voltage: 100–240V AC Frequency: 50Hz to 60Hz, single phase Operating temperature: 10° to 35° C (50° to 95° F) Relative humidity: 5% to 95% non-condensing Operating altitude: tested up to 3,000 metres Dimensions Height: 45.0 cm Width: 52.8 cm Stand depth: 17.5 cm Weight: 5.68 kg Interfaces RJ-45 connector 3.5mm headphone jack SDXC card slot 4 x USB 3.0 ports 2 x Thunderbolt 2 ports Mini DisplayPort output Support for HDMI, DVI, VGA and dual-link DVI (adapters sold separately) FaceTime HD camera