Digital and Electronic Device Design Avoi Set Top Box Digital video broadcasting device by Vestel ID Team Avoi is one of the newest Smart Set Top Boxes of Vestel providing mainly digital broadcasting technology for TV users. Avoi's the most important character is "hidden ventilation". Hidden ventilation makes possible to create unique and simple designs. However, inside plastic cover there is a metal case, which is used to prevent the product from overheating. With Avoi, besides watching the digital channels in HD quality, one can listen to music, watch movies and look at photographs and images on TV screen, while controlling these files through UI menu. Avoi's operating system is Android V4.2 Jelly Bean system. Avoi's other specifications are; integrated Wi-Fi 802.11 b/g/n/ac, integrated Bluetooth V4.0, LAN, SPDIF, O/B power supply unit, WPS button, WMM and Miracast. Lastly, Avoi has 2 USB ports and AV out. All of these features ensure a pleasant home entertainment experience for end user, which also upgrades a standard TV from a display to a home entertainment system.