Google’s kicked off a neat promotion for Chromecast and Chromecast Ultra owners in the United States.

Running until July 31, customers can rent an “eligible” movie—including Fifty Shades Darker, John Wick Chapter 2 and The Great Wall—from Play Movies for just 99 cents.

Be warned, though: while the offer expires at the end of July, you’ll need to redeem the film you selected by August 31 or the code will expire, and you’d have blown 99 cents on nothing.

For the full list of terms and conditions, be sure to head over to Google’s website.