iPhone X (pronounced "ten") was announced on September 12, 2017, alongside the iPhone 8 and iPhone 8 Plus at the Steve Jobs Theater in the Apple Park campus. The phone was released on November 3, 2017. The iPhone X has a 5.8-inch (diagonal) OLED color-accurate screen that supports DCI-P3 wide color gamut, sRGB, and high dynamic range. This "Super Retina HD Display" has the True Tone technology found on the iPad Pro, which uses six-channel ambient light sensors to adapt the display's white balance to the surrounding ambient light. The iPhone X has two color options, Silver and Space Gray. The front and back of the phone are composed of surgical-grade stainless steel to improve durability. The back has a glass slab over the aluminum to enable wireless charging. The design is intended to be IP67 water and dust resistant. Face ID replaces the Touch ID system. The facial recognition sensor consists of two parts: a "Romeo" module that projects more than 30,000 infrared dots onto the user's face, and a "Juliet" module that reads the pattern. The pattern is sent to the secure enclave in the A11 Bionic chip (which contains a dedicated AI accelerator) to confirm a match with the phone's owner's face. The home button, which made its debut on the original iPhone, has been removed from iPhone X and most of its functions replaced with gestures.