Offer valid from November 1, 2018 to March 30th, 2022, while supplies last. Available only in Microsoft retail and online store in United States (including Puerto Rico) and Canada. Offer valid only on select accessories after purchase of select PC. Not valid on prior orders or purchases; cannot be transferred or otherwise redeemed for cash or promo code(s). May not be combinable with other offers. Refunds will take into account the discount. Price discount does not include taxes, shipping or other fees. Void where prohibited or restricted by law. Microsoft reserves the right to modify or discontinue offers at any time. Limit of 5 offers per device. Other exclusions and limits may apply.