The Samsung Galaxy S4 uses a refined version of the hardware design introduced by the Samsung Galaxy S III, with a rounded, polycarbonate chassis and a removable rear cover. It is slightly lighter and narrower than the Samsung Galaxy S III, with a length of 136. 6 mm (5. 38 in), a width of 69. 8 mm (2. 75 in), and a thickness of 7. 9 mm (0. 31 in). At the bottom of the device is a microphone and a microUSB port for data connections and charging; it also supports USB-OTG and MHL 2. 0. Near the top of the device are a front-facing camera, infrared, proximity, and ambient light sensors, and a notification LED. In particular, the infrared sensor is used for the device's "Air View" features. A headphone jack, secondary microphone and infrared blaster are located at the top. The S4 is widely available in black and white color finishes; in selected regions, Samsung also introduced versions in red, purple, pink, brown with gold trim, and light pink with gold trim. In late-January 2014, Samsung's Russian website briefly listed a new black model with a plastic leather backing, similar to the Galaxy Note 3. The S4's display is larger than its predecessor, with a 5-inch (130 mm), 1080p PenTile RGBG Super AMOLED screen with a resolution of 441 PPI, and Corning Gorilla Glass 3. Unlike previous models, the S4 does not contain FM radio support, citing the increased use of online media outlets for content consumption on mobile devices.