The touchscreen on the first five generations is a liquid crystal display with scratch-resistant glass; The one on the iPhone 5, 5C, 5S, and first generation SE is ; The size of the iPhone 6, 6S, 7, 8, and second generation SE is ; the iPhone 6 Plus, 6S Plus, 7 Plus, and 8 Plus is ; The iPhone X, XS, and 11 Pro with ; The iPhone XR, and 11 with ; and the iPhone XS Max and 11 Pro Max with . The capacitive touchscreen is designed for a bare finger, or multiple fingers for multi-touch sensing. The screens on the first three generations have a resolution of 320×480 (HVGA) at 163 ppi; those on the iPhone 4 and iPhone 4S have a resolution of 640×960 at 326 ppi; the models, with 640×1136 at 326 ppi; the models, with 750×1334 at 326 ppi; the models, with 1080×1920 at 401 ppi; and the model X, with 1125×2436 at 458 ppi. The initial models were using twisted-nematic (TN) LCDs. Starting with iPhone 4, the technology was changed to in-plane switching (IPS) LCDs. The iPhone 5 model's screen results in an aspect ratio of approximately 16:9. The iPhone X is the first iPhone to use an OLED display. It has a near bezel-less screen with a ≈19.5:9 aspect ratio.