Display : 

Retina HD display
5.5-inch (diagonal) widescreen LCD
Multi-Touch display with IPS technology
1920-by-1080-pixel resolution at 401 ppi
1300:1 contrast ratio (typical)
Wide color display (P3)
625 cd/m2 max brightness (typical)
Dual-domain pixels for wide viewing angles
Fingerprint-resistant oleophobic coating
Support for display of multiple languages and characters simultaneously
Display Zoom
Reachability

Splash, Water, and Dust Resistant : Rated IP67 (maximum depth of 1 meter up to 30 minutes) under IEC standard 60529

Camera:

Dual 12MP wide-angle and telephoto cameras
Wide-angle: ƒ/1.8 aperture
Telephoto: ƒ/2.8 aperture
2x optical zoom; digital zoom up to 10x
Portrait mode
Optical image stabilization
Six‑element lens
Quad-LED True Tone flash
Panorama (up to 63MP)
Sapphire crystal lens cover
Backside illumination sensor
Hybrid IR filter
Autofocus with Focus Pixels
Tap to focus with Focus Pixels
Live Photos with stabilization
Wide color capture for photos and Live Photos
Improved local tone mapping
Exposure control
HDR for photos
Auto image stabilization
Burst mode
Timer mode
Photo geotagging
Image formats captured: HEIF and JPEG

Video Recording: 

4K video recording at 30 fps
1080p HD video recording at 30 fps or 60 fps
720p HD video recording at 30 fps
Optical image stabilization for video
2x optical zoom; digital zoom up to 6x (iPhone 7 Plus only)
Quad-LED True Tone flash
Slo‑mo video support for 1080p at 120 fps and 720p at 240 fps
Time‑lapse video with stabilization
Cinematic video stabilization (1080p and 720p)
Continuous autofocus video
Take 8MP still photos while recording 4K video
Playback zoom
Video geotagging
Video formats recorded: HEVC and H.264

FaceTime HD Camera :

7MP camera
1080p HD video recording
Retina Flash
ƒ/2.2 aperture
Wide color capture for photos and Live Photos
HDR for photos
Backside illumination sensor
Auto image stabilization
Burst mode
Exposure control
Timer mode

Touch ID : Fingerprint sensor built into the Home button