This promo code allows you to get a free one-night blu-ray disc rental. It does not stack for more than one day, so return the next day. Redbox still does require a debit card to be used, in case you don't return it the next day, but the total will be $0 if you return it the next day. It also allows for renting of DVD's in case you don't have a blu-ray player. (PS4's have blu-ray players built in, so if you have one, use it and get a blu-ray disc for better quality.) But, if you don't have a blu-ray player, DVD's also work. The normal price is $2.00 for a blu-ray disc and $1.75 for a DVD. (Expires 7/31, new batch will expire later but don't have it yet)