 A portable converter box (such as Winegard's RCDT09A) would require a bulky external battery and mobile ATSC is not yet available.Another option to people would be getting a USB-based TV tuner card for their laptop computer, which in addition to its low costs became a popular option after Microsoft released Windows 7 four months after the DTV transition ended.A Google-sponsored program called Free the Airwaves sought to use the "empty" white space "within" the remaining TV for unlicensed use, like for Wi-Fi.