Regardless of carrier support, all iPhone 7 models have a 4.7" (diagonal) widescreen multitouch LED-backlit 1334x750 native resolution "Retina HD" display (326 ppi, 625 cd/m2) and a taptic-engine powered solid state "clickless" Home button.
It has dual cameras -- a rear 12-megapixel camera with optical image stabilization, a f/1.8 aperture, a 6-element lens and wide color capture -- as well as a front 7-megapixel "FaceTime HD" camera with support for 1080p video.
The iPhone 7 uses an aluminum case and is splash, water, and dust-resistant (IP67), but notwater-proof, and it has stereo speakers and a Lightning port, but lacks a traditional headphone jack. It originally was available in five metallic color options -- "silver," which has a white glass front and a silver colored back; "gold," which has a white glass front and a gold colored back; "rose gold," which has a white glass front and a pink-tinted gold colored back; and introduces two new options, "black" (pictured) which has a black glass front and a matte black back; and "jet black," which has a black glass front and a high-gloss black anodized and polished black aluminum back. Apple warns that the "jet black" finish "may show fine micro-abrasions with use." On March 21, 2017, Apple also added a (PRODUCT) RED Special Edition which has a white glass front and a red colored aluminum back. This (PRODUCT) RED Special Edition was discontinued on September 12, 2017.
Internally, the iPhone 7 is powered by a 64-bit "Apple A10 Fusion" processor with four cores -- two high performance cores and two high efficiency cores -- and has 2 GB of RAM, as well as 32 GB, 128 GB, or 256 GB of flash storage (jet black and red options originally were only available in 128 GB and 256 GB capacities, although Apple introduced a 32 GB jet black variant on September 12, 2017 when it also discontinued the 256 GB capacity for all colors). It also supports 802.11a/b/g/n/ac Wi-Fi with MIMO, Bluetooth 4.2, LTE (4G), and NFC for Apple Pay.
Apple estimates that the iPhone 7 provides "up to" 40 hours of audio playback, 14 hours of talk time on 3G, 12 hours of Internet use on 3G, 12 hours of Internet use on LTE, 14 hours of Internet use on Wi-Fi, 13 hours of wireless video playback and "up to" 10 days of standby time.