***IMPORTANT:  Be sure you order for the correct model.  Compare the model # in the title and description to your Nook model number before you purchase.  The card does not work in a different model***  Buy a genuine AndroidForNook (AFN Card[TM]) only from AFN Products, LLC.  Convert your Nook Tablet (BNTV250 & BNTV250A) into a powerful Android Tablet without voiding your warranty.  KitKat is Google's latest version of Android and it makes the Nook Tablet a truly enjoyable  tablet.  AndroidForNook (AFN Card[TM]) dual-boot micro SD cards allow you to choose between Nook e-reader and Android at startup without removing your card.  Save your money - no fancy packaging, just a great product at an affordable price, with superior customer support through a top-notch forum and personal communication.  Easy to follow, step-by-step instructions guide you through the initial setup process.  Features of the AndroidForNook AFN Card[TM]:  Custom designed-for AFN Products boot menu which lets you choose between Nook or Android operating system at startup.  This menu is also used to update your card with free upgrades offered by AFN Products.  Check the Amazon seller name - only AFN Products, LLC sells the genuine AFN Card[TM].  AFN is well-known with outstanding reviews on Nook book club forums and other websites.  Android is open source software offered by Google and is conveniently provided pre-configured on your AFN card.NOTE:  You will receive a separate email through Amazon after your order with attached setup instructions.  Instructions are also included on your card which you can print out when you receive it.  DISCLAIMER: Some Nook Tablets (perhaps 20%) require the power cable to be plugged into the charger or your PC in order to boot to Android on the micro SD card.  This is a Nook hardware limitation, not an AFN defect.  Contact us if you have questions about this issue.