Thanks to technology, Black Friday shoppers can score major deals days ahead of Thanksgiving without ever leaving their home.

This year, retailers like Amazon and Wal-Mart are offering pre-Black Friday sales online for bargain hunters.

"The retail environment is incredibly competitive and we know that our customers are looking to us for the lowest prices and great deals all season long," said Duncan Mac Naughton, chief merchandising officer, Wal-Mart U.S., according to CBS Detroit. "That's why we've more than doubled the amount of items included in our Pre-Black Friday Event."

Up until Nov. 27, Wal-Mart is selling "Frozen" the sing-along edition DVD for $14.96, a Keurig K40 Single Serve Coffeemaker for $99 and PlayStation 4 for $399 with a $50 gift card.

Meanwhile, Amazon is treating customers with online sales that started one week ahead of Black Friday, in addition to offering new items every 10 minutes. Some of the deals include a 32-inch LED TV for $79, Lincoln Logs Redwood Junction for $40 and half price off of a "Diary of a Wimpy Kid Box of Books 1-8."

"Our customers are redefining Black Friday shopping. They want to stay home with family, enjoy some turkey and football and shop the hottest deals from their phone, tablet or PC," said Steve Shure, Amazon vice president of worldwide marketing. "Starting Nov. 21, we will add new deals as often as every 10 minutes, for eight days, including tech, toys, tools and more."

Furthermore, Amazon is also offering six special "Deals of the Day" and three on both Thanksgiving day and Black Friday.

Amazon Prime members will get access to limited-time "Lightning Deals" that allot 30 minutes to customers before opening up to the general public. "Lightning Deals" will be in effect for either a specified amount of time or until all of the items available are sold out.

For the holiday, Amazon has hired extra workers and installed more robots in its warehouses to fill orders. Online shoppers should also check out websites like BradsDeals.com and PriceGrabber.com to compare prices.

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