Online shopping giant Amazon has begun shipping a large screen, high definition version of its popular Kindle Fire tablets. Amazon started shipping the device on November 15, 2012 ahead of schedule, so as to challenge Apple’s iPad in pre-Christmas sales.

Amazon said that the Kindle Fire HD tablets which were ordered online were on their way to buyers at US consumer electronics shops. Dave Limp, the vice president of Kindle said, “Kindle Fire HD has been Amazon’s best-selling product worldwide since launch and that was before we even started shipping the best tablet we’ve ever built”.

Limp added that on the new tablets customers are going to love web browsing, email, watching TV shows, reading magazines, fast Wi-Fi and exceptional audio. The new Kindle Fire HD was unveiled in the month of September by Amazon and was priced at $299.

Analysts saw Amazon’s tablet as a clear competitor to the market-leading iPad, manufactured by tech giant Apple. The Kindle Fire HD has dual band Wi-Fi and two antennas, while the seven inch Kindle Fire HD priced at $199 was available for sale in the month of September. The Kindle Fire HD 4G version will sell at $499, which is the same price as the basic iPad.