American Express has taken its Card Sync technology on Twitter even more social, as cardholders can tweet to specific hashtags and buy discounted products. The first offer, announced on Feb. 11, is a $25 American Express Gift Card that can be purchased for $15 by tweeting #BuyAmexGiftCard25. The offer expires on March 3.

On Feb. 13, more products will go on sale at noon EST, American Express said in a press release. The full list of sale items will be on American Express’s Twitter page. These offers include merchandise from Amazon, Sony, Urban Zen and Xbox 360. AmEx noted that quantities are limited.

According to the press release, this is how the process will work:

  • Sync your eligible Card at sync.americanexpress.com/twitter.
  • Cardmembers tweet special product #hashtags for the product they want to purchase with their synced Card.
  • Cardmembers then check their Twitter mentions in the @ Connect tab (https://twitter.com/i/connect) for a response from @AmexSync containing a confirmation #hashtag. Tweet the confirmation #hashtag within 15 minutes of the response from @AmexSync to confirm the purchase.
  • All products will be shipped to the Cardmember's billing address via free 2-day shipping, courtesy of American Express.

Buying an item via Twitter isn’t a snap, but with more than 619,000 followers on Twitter, assume American Express will have plenty of shoppers.