Tesla will show off a brand new thing on Thursday, April 30, at its Hawthorne Design Studio, CEO Elon Musk tweeted today. Musk promises that this is not a car, but it is a "major" new product line. We'll have all the news as soon as it's announced, so check back here on April 30 for the big reveal.

Major new Tesla product line -- not a car -- will be unveiled at our Hawthorne Design Studio on Thurs 8pm, April 30 - Elon Musk (@elonmusk) March 30, 2015