FREE: 1 Redbox Rental

im thinking its online but i dont even know how the redbox stuff works lol but in the eamil sent to me it says to log online and enter

It says:
Redbox One (1) Night Standard Definition DVD Rental. Promo code expires 11/7/12. All promo codes valid for a 1-night DVD rental or a discount worth the value of the standard DVD daily rental rate off the first night's daily rental fee for a Blu-ray Disc™ or video game. Limit 1 code per transaction, regardless of number of rentals. One time use of code only. Online Game winning promo codes are valid for use and redeemable only at www.redbox.com and via the official Redbox app. A valid redbox.com user account is required to redeem an Online Game winning promo code. Not redeemable for prior rentals. Your payment card (necessary for any rental) will be charged the excess daily rental fee for a Blu-ray Disc™ or video game and the full daily rental rate for any additional items, plus applicable tax (except for MD rental transactions for which additional tax is not charged) for the first night of rental, if applicable, and will be charged the full daily rental fee for all items plus applicable tax (except for MD rental transactions) for each day you do not return your rental by 9:00pm local time (at the box) after first rental night. Void where prohibited by law. Code must not be copied, sold, or otherwise offered. Any other use constitutes fraud. Cannot be combined with other offers. Not redeemable for cash. Prize subject to terms at redbox.com/terms and redbox.com/rentalterms. Must be at least 18 years old to redeem.