The second annual Amazon Prime Day begins at midnight tonight for the millions of Amazon Prime members around the world. In addition to the U.S., shoppers in Spain, Japan, France, Canada and the U.K. can participate. The company said the sale will be the “biggest global Amazon event ever.”

Amazon (NASDAQ:AMZN) is promising more than 100,000 deals across nearly all of its categories, however, it has been tight-lipped about exactly what will be on sale. There’s been tons of speculation about what the best deals will be. Reports are claiming that Amazon will be selling televisions at up to 40 percent off, electronics at up to 45 percent off, and shoes at half off. The deals will be slightly different in each country.

The offers will include Lightning Deals, which will be available for a fixed amount of time, and Deals of the Day, which will be available throughout Prime Day until sold out. Reports say that new sales will become available throughout the day as frequently as every five minutes. Customers who have Amazon’s Echo device can get $10 off their first purchase of at least $20 when they buy through the device. Some publications have been pitching step-by-step plans for finding and snagging the biggest bargains.

The first Prime Day was held last year to mark the 20th anniversary of Amazon. More than 1,200 TVs priced under $1,000 sold out in less than 10 minutes last year. The first Prime Day also saw 28,000 Rubbermaid sets and 24,000 pressure cookers sold. Amazon said it’s worked with vendors to increase supply, but still expects many of the deals to sell out fast.

The original Prime Day also saw many complaints lodged by unhappy Prime members. Many of the best sales were sold out in seconds. Many of the other deals promoted during the sale were mediocre or bizarre. Customers also complained of having a hard time finding and tracking deals. Many turned to the internet to vent under the hashtag #primedayfail.

This year, customers will be able to sort by category if they are looking for specific products and track an item with Amazon’s app. The company has also been releasing walk-up promotions since July 5. However, one thing that won’t go on sale is the $99 Prime membership.

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