Tesco on Friday unveiled the details of its new Android tablet which goes on sale on 9 October.The hudl2 includes an 8.2 inch 1920x1200 HD screen and will be available in eight different colours.The device is powered by an Intel Atom 1.83GHz quad-core processor for fast web access, browsing photos and reading e-books.Tesco's tablet retails at £129.Like the other 'big four' UK supermarkets, Tesco has been trying to win back market share after losing ground to discount rivals including Lidl and Aldi.Adding pressure on the supermarket was news this week that the Financial Conduct Authority was investigating its accountancy practices after it revealed that it had overstated its half-year profits by £250m.