16, 32, 64, 128GB memory version. Retina display. LED-backlit Multi-Touch display. Fingerprint-resistant oleophobic coating. FaceTime video calling over WiFi. Face detection. Dual microphones. 3.5-mm stereo headphone minijack. Up to 10 hours of surfing the web on Wi-Fi, watching video, or listening to music. Three-axis gyro, accelerometer, ambient light sensor, digital compass. Video mirroring and video out support: Up to 1080p through Lightning Digital AV Adapter and Lightning to VGA Adapter (adapters sold separately). Video formats supported: H.264 video up to 1080p, 60 frames per second, High Profile level 4.2 with AAC-LC audio up to 160 Kbps, 48kHz, stereo audio in .m4v, .mp4, and .mov file formats; MPEG-4 video up to 2.5 Mbps, 640 by 480 pixels, 30 frames per second, Simple Profile with AAC-LC audio up to 160 Kbps per channel, 48kHz, stereo audio in .m4v, .mp4, and .mov file formats; Motion JPEG (M-JPEG) up to 35 Mbps, 1280 by 720 pixels, 30 frames per second, audio in ulaw, PCM stereo audio in .avi file format. Viewable document types .jpg, .tiff, .gif (images); .doc and .docx (Microsoft Word); .htm and .html (web pages); .key (Keynote); .numbers (Numbers); .pages (Pages); .pdf (Preview and Adobe Acrobat); .ppt and .pptx (Microsoft PowerPoint); .txt (text); .rtf (rich text format); .vcf (contact information); .xls and .xlsx (Microsoft Excel); .zip; .ics. Use your voice to send messages, set reminders, and more. Video stabilization, face detection, tap to focus while recording, backside illumination, 3x video zoom. Five-element lens, hybrid IR filter, f/2.4 aperture, tap to focus video or still images. Tap to control exposure for video or still images. Photo and video geotagging, HDR photos.