Your super-quick guide to Amazon Prime Day

Think of it as Black Friday in July. Tuesday, July 12, is Amazon’s (AMZN) second annual Prime Day, and the company is offering deals on 100,000 items over 24 hours. New deals will be introduced as often as every five minutes. Here’s a rundown of what to expect.

Starting at midnight PT/ 3 a.m. ET, Amazon is offering promotions exclusively to its Prime members. Consumers who aren’t Prime members who want to get in on the deals can sign up for a free 30-day trial. This will be the Seattle retailer’s second Prime Day; last year the company reported 34.4 million items sold, which translates to 398 items per second.

There are three different kinds of deals that will be available: lightning, spotlight and savings and deals. The lightning deal, as the name implies, is available for a limited time, a few hours at most. Spotlight deals are ones Amazon highlights as the best sales of the day. Savings and deals are promos that will be available all day. You can find the deals online or on the Amazon Shopping mobile app.

Prime members who have an Echo device can get $10 off their first purchase of at least $20 if they snag a deal using their voice.

Members in countries that currently offer Amazon Prime memberships — the US, UK, Spain, Japan, Italy, Germany, France, Canada, Belgium and Austria — will have access to these sales.

For extra hype, Amazon has been offering “countdown deals” for Prime members between July 5 and July 11 — Monday’s include vacuums, protein powders and fitness tracking devices.

What kinds of deals can you expect?

Despite Amazon calling last year’s Prime Day a huge success, many customers took to social media to express dissatisfaction over what some saw as low-quality, seemingly random products, like thermal laminators and 24-inch shoehorns. One likened the day to a “Marshall’s clearance bin.”

That’s why this year Amazon is offering a lot more stuff. “Following last year’s record sales, we have dramatically increased the inventory behind many deals,” said Greg Greeley, vice president of Amazon Prime, in a statement.

Specifically highlighting TVs, headphones, slow cookers and vitamins, the company says you’ll be able to get your hands “on things you want, things you need, and everything in between.” Amazon will offer nearly twice the number of TVs compared to Black Friday and Cyber Monday combined.