Apple is readying the debut of its next iPhone, which sources say will feature a dual-camera system (on the larger version), a re-engineered home button that vibrates, and no headphone jack. By featuring a design similar to last year’s 6S and 6S Plus, Apple is breaking its typical two-year redesign cycle. The two phones will reportedly retain the 4.7-inch and 5.5-inch screen sizes. The introduction of new iPhones is likely in response to dwindling sales, the result in part to the two-year gap between new models.

Bloomberg notes that the new iPhones, expected to debut as early as next month, will be key to Apple’s holiday sales and the quarter’s revenue. Sources say that Apple will eliminate the “two innermost antenna lines that run across the back of the current iPhones.”

The dual cameras work together to provide “brighter photos with more detail,” and the cameras’ two images merge to provide a better image for photos taken in low-light conditions as well as for zooming “while retaining more clarity.” The dual-camera feature will, however, only be available on the phone’s larger version, says KGI Securities analyst Ming-Chi Kuo.

As 9to5Mac reported earlier, the new home button will be pressure-sensitive and rely on haptic feedback, similar to the latest MacBook trackpads. Macotakara revealed earlier that Apple was doing away with the headphone jack. Instead, Apple offers connectivity via Bluetooth and the charging port, leaving room for a second speaker. In 2014, the same year Apple acquired Beats Electronics, the company began to let headphone manufacturers connect via the charger connector.

The new iPhones will run on iOS 10, the new OS debuting this fall that will run on current and select past iPhones. The new OS “offers interactive widgets to quickly glance at calendar appointments and favorite contacts, new messaging features, a new application for controlling smart home appliances, and a redesigned Apple Music.”

Apple is expected to release an overhauled iPhone in 2017, the smartphone’s 10th anniversary.