All iPhone 6s Plus models have a 5.5" (diagonal) widescreen pressure-sensitive "3D Touch" LED-backlit 1920x1080 native resolution (401 ppi) "Retina HD" display with "IPS technology and a taptic engine," and dual cameras. The rear 12 megapixel, 4K "iSight" camera has 1.22 micron pixels, an f/2.2 aperture, support for simultaneous 4K video and 8 megapixel still photography, and optical image stabilization for both photos and video. The front 5 megapixel, 720p "FaceTime" camera is more modest in capability.
The iPhone 6s Plus is powered by a 64-bit 1.8 GHz "Apple A9" processor and has 2 GB of LPDDR3 RAM and 16 GB, 32 GB, 64 GB, or 128 GB of flash storage (16 GB and 64 GB options discontinued and 32 GB option introduced on September 7, 2016). It also supports 802.11a/b/g/n/ac Wi-Fi with MIMO, Bluetooth 4.2, LTE (4G), and NFC for Apple Pay. It has a bottom-mounted headphone jack and uses a "Lightning" port to connect to a Mac, PC, dock, or power adapter.
Apple estimates that the iPhone 6s Plus provides "up to" 80 hours of audio playback, 12 hours of talk time on 3G, 12 hours of Internet use on 3G, 12 hours of Internet use on LTE, 12 hours of Internet use on Wi-Fi, 14 hours of video playback and "up to" 16 days of standby time.