Offer valid from 9:00 PM PST on January 25, 2018 to 11:59 PM PDT on December 31, 2018, while supplies last. Offer available on select PC and select Windows Mixed Reality headsets. Available only in Microsoft online store in the United States (excluding Puerto Rico) and Canada. 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. Other exclusions and limits may apply.