On September 12, 2018, Apple unveiled the iPhone XS, XS Max, and XR at the Steve Jobs Theater at Apple Park. The XS and XS Max feature an improved Super Retina Display with Dolby Vision and HDR10 support with the XS Max featuring a larger 6.5" display, improved cameras with Smart HDR, and the A12 Bionic chip. The iPhone XS and XS Max are IP68 water, liquid, and dust resistant which allow the devices to be submerged in up to 2 meters for a duration of 30 minutes, while iPhone XR retained the IP67 certification found in the first-generation iPhone X and also features an IPS LCD display instead of the OLED displays found in the higher end models. The iPhone XS/XS Max's IP68 certifications were tested using various liquids such as chlorinated-water, salt water, tea, wine, beer, and juices. Apple also announced the fourth generation of Apple Watch, the Apple Watch Series 4.