Detailed Specifications:
Display: 21.5-inch LED-backlit display with 1920 x 1080 resolution 
Processor: 2.3 GHz dual-core Intel Core i5, Turbo Boost up to 3.6GHz 
Memory: 8GB of 2133MHz DDR4 memory, configurable to 16GB 
Storage: 1TB (5400-rpm) hard drive, configurable to 1TB Fusion Drive or 256GB SSD 
Graphics: Intel Iris Plus Graphics 640 
Connections and Expansion:
3.5 mm headphone jack 
SDXC card slot 
Two Thunderbolt 3 (USB-C) ports 
Four USB 3.0 ports 
Gigabit Ethernet 
802.11ac Wi-Fi 
Bluetooth 4.2 
Operating System: macOS