Google's recently unveiled Nexus 7 has turned out of the most awaited Android tablet manufactured so far. Most of the features of the tablet, if not all, are known. But it looks like that there is one feature that neither Google nor Asus talked about.

A YouTube user, going online by the name "wwscoggin" posted a video of the Nexus 7 tablet showing the smart cover functionality of the tablet. The sensor is located at the bottom left-hand side of the tablet.

The Nexus 7 is apparently the first non-Apple tablet to include a magnetic sensor. As detailed in the video clip, which can also be found below, the device falls asleep as user moves the external magnet near the magnetic sensor, which seems to be located in the bottom left-side of the tablet. This is an awkward position to place a magnetic sensor. As covers open from left to right side, most of magnetic covers might result in malfunctioning to the auto sleep/wake function.

Google sells covers for the Nexus 7 tablet, but it does not mention any Smart Cover type of technology. Though Asus specifically calls it Smart Cover, but again there are no words on the magnetic sensor.

A Google spokeswoman confirmed to CNET that the functionality is there in the tablet, but refused to provide any further details.

Google clearly wants to make its tablet a big hit and the hidden Smart Cover functionality could be a surprise for its customer. The Nexus 7 tablet has received a lot of positive review, especially for its super fast processor and affordable price tag.

It was believed that the Google has a little profit margin in selling the tablet and the tech giant may even incur a net loss for every 8GB version of the Nexus 7 tablet sold. However, iSuppli teardown reveals that the tablet costs just $151 to build, which is $40 lower than earlier projections.

Nexus 7 pack some high-class features, but it is identical to the Kindle Fire tablet for most of its internals. Undoubtedly, it is an ultimate Kindle Fire killer, but Amazon is also preparing for a counterattack with its next generation Kindle Fire 2 tablet.