5.5-inch (diagonal) widescreen LCD Multi-Touch display - 1920-by-1080-pixel resolution at 401 ppi
A11 Bionic chip with 64-bit architecture, Neural engine, Embedded M11 motion coprocessor
12MP wide-angle and telephoto camera, 7MP FaceTime HD Camera
64GB internal storage (expandable with iCloud)
"A Certified Refurbished product has been tested and certified to work and look like new, with minimal to no signs of wear, by a manufacturer or specialized third-party seller approved by Amazon. All products are backed by a minimum 90-day warranty."