Mi Box S brings Chromecast, Google Assistant, 4K HDR to an already established Android TV Platform. Android 8.1.XIAOMI Mi Box S is based on the Android 8.1 OS, with high speed and smooth performance, which is designed to turn your regular TV into a smart one.DDR3 2GB RAM, eMMC 8GB ROM. It is configured with DDR3 2GB RAM, and eMMC 8GB ROM, thus it can provide enough room and freedom to install Apps without worrying about running out of space. Just speak into the remote control and XIAOMI Mi Box S will search for what you want. The Mi Box S supports both Dolby audio and DTS-HD audio encoding. Premium Audio puts you in the action. Dolby and DTS deliver crisper, three-dimensional surround sound.