Microsoft’s 12 Days of Deals Christmas sales promotion continues on Tuesday with a special Fitbit bundle that fitness buffs will certainly appreciate. After discounting a variety of devices in the past days, most of them related to Microsoft’s core products, including Windows, Windows Phone and Xbox One, the company has chosen for a popular fitness tracker to include in its holiday promotion on December 16th.

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Microsoft is thus ready to offer buyers $39.99 off a Fitbit Activity Tracker and Yurbuds Earbuds Bundle, with prices starting at $99.95.

Buyers can choose their desired Fitbit version in a couple of different color options, and a free pair of Yurbuds earbuds — it’s actually the earbuds, regularly priced at $39.99, that get discounted to $0.

The available options include either a $99.95 Fitbit Flex (in black or slate) or a $129 Fitbit Charge (in black or slate), and combine them with either Yurbuds Inspire 300 or Yurbuds Ironman Inspire Talk Sport earbuds.

Just like previous deals, the offer is available both in Microsoft’s online store and in retail stores in the U.S. and Canada for one day only.

Additionally, spending $75 or more on merchandise from the Microsoft store, will get buyers a $25 discount, as long as they text “FITBIT” to 29502.