Display: Retina HD display with 3D Touch5.5-inch (diagonal) LED-backlit widescreen 1334-by-750-pixel resolution at 326 ppi 1400:1 contrast ratio (typical)
Chip: A9 chip with 64-bit architecture, Embedded M9 motion coprocessor
iSight Camera: New 12-megapixel iSight camera with 1.22µ pixels, Live Photos, Autofocus with Focus Pixels, Auto HDR for photos
Video Recording: 4K video recording (3840 by 2160) at 30 fps, 1080p HD video recording at 30 fps or 60 fps, 720p HD video recording at 30 fps, Optical image stabilisation for video (iPhone 6s Plus only), True Tone flash, Slo-mo video support for 1080p at 120 fps and 720p at 240 fps, Time-lapse video with stabilisation
FaceTime HD Camera: 5-megapixel photos, 720p HD video recording, Retina Flash.
Touch ID: Fingerprint sensor built into the Home button.
iOS: iOS 9 The world’s most advanced mobile operating system gets major enhancements to built-in apps, a smarter Siri and search, and much more.