FCC approval documents for what is believed to be the Dell Looking Glass have been revealed Monday, shedding new light on the unannounced tablet. The upcoming tablet codenamed Looking Glass received its Wi-Fi Alliance certification last last week, and now an FCC approval brings additional information ahead of Dell’s imminent announcement. Notable specs include 3G compatibility with both AT&T and T-Mobile’s networks, SD card support, Wi-Fi 802.11n and Bluetooth 2.1 + EDR. Rumors also suggest that the tablet will feature Google’s Android OS, a 7-inch touchscreen display and a Tegra 2 processor. The Looking Glass may be revealed next week at the Consumer Electronics Show in Las Vegas, likely with “Streak” branding to line up with Dell’s first tablet device.