Hugo Barra, director of product management at Google Inc., speaks about the latest version of the Android operating system called Jelly Bean, during the Google I/O conference in San Francisco, California, U.S., on Wednesday, June 27, 2012. (David Paul Morris/BLOOMBERG)

Google is expected to make an product announcement Wednesday, but pre-order pages for new versions of its Nexus 7 tablets are already up on the Web site for Best Buy.

According to the store’s Web site, the Nexus 7 will be available with 16 GB or 32 GB of memory and packs a 5 MP rear-facing camera and a 1.2 MP front-facing camera. The 16 GB version will cost $229.99; the 32 GB version is $269.99.

Best Buy could not immediately be reached for comment on the tablet. The product pages were first spotted by The Verge.

The pages appeared ahead of a planned Google event hosted by Android chief Sundar Pichai in San Francisco. CNET reports that the event might also reveal the as-yet-unreleased Moto X smartphone or possibly a new Chromebook, as Pinchai also oversees Chrome.

Google didn’t offer many details about plans for the future in hardware or software during its annual I/O developers conference in May. While the company did show off a few major features and upgrades to products such as Google Maps, it deviated from past behavior and didn’t announce a new operating system or launch any new products.

The new version of the Nexus 7 on Best Buy’s site is thinner and lighter than its predecessor, weighing 11.2 ounces and is 0.3-inch thick. The current tablet weighs 12 ounces and is 0.4 inches thick. The specs on the retailer’s site also say that the tablet has a 1920 x 1200 display resolution, an improvement on the tablet’s current screen resolution.

The tablet will run Android 4.3 Jelly Bean — a version of the mobile operating system that hasn’t been officially unveiled yet -- indicating that Google will probably have more than one announcement up its sleeve today.

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