Microsoft has reportedly sent out invites for an event in New York City on 23 September. The event is expected to focus on the launch of the new Surface 2 and Surface Pro 2 tablets.

The invite sent out by Microsoft has asked the media to mark the date for a Surface event. There have been many leaks and rumours about the possible specs on the new devices.

Both the Surface 2 and Surface Pro 2 are not expected to feature any changes in terms of basic design. Many of the competitors however are switching to a smaller bezel to accommodate a bigger screen or give the device a sleek design.

The Surface Pro 2 is rumoured to come with the new Intel's Haswell Core i5 processor. The RAM is rumoured to be doubled from 4 Gb to 8 GB. The upgrade from the previous generation is also expected come with a better battery life.

The Surface 2 tablet is expected to come with a Windows RT 8.1 operating system, with a 10.6 inch 1080p display and Nvidia's Tegra 4 processor. There is also an expected improvement in the battery life; however the improvement is not expected to be phenomenal.

The new rumoured Keyboard which doubles as a cover is said to have a built-in battery which will add to the battery life of the tablet. This feature is expected to come only with the Surace Pro 2. The users of the Surface 2 may not be able to use this feature.

In terms of connectivity the Surface 2 is expected to come with a USB 3.0 port and support 802.11 Wi-Fi along with the Bluetooth.

The previous generation has only come in a black colour variant with customers relying on accessories for colour variation. The new Surface 2 is rumoured to come in both Black and White colour variants which is in line with the industry standards.

Although the tablets could be unveiled at the Sept 23 event, the tablets are expected to be available for sale only from mid October. This will be the time when Microsoft could launch the new Windows 8.1.

There is still no word about the possible pricing for the device but it has been speculated that the Surface Pro 2 could be priced at around $799.