The iPhone 7’s overall design is similar to that of the iPhone 6S, but with new color options, added water and dust resistance, a new capacitive home key, and the removal of the 3.5 mm headphone jack(an adapter for attaching wired headphones via the Lightning port, as well as earphones that connect via Lightning, are included with the phone). The devices’ internal hardware also received upgrades, including a heterogeneous quad-core system-on-chip with improved system and graphics performance, and upgraded cameras(including 12 megapixel rear-facing cameras with optical image stabilization on both models, and an additional telephoto lens on the iPhone 7 Plus model to provide enhanced zoom capabilities).