The SmartTag and SmartTag Plus are brand-new Bluetooth trackers announced alongside the three new Galaxy S21 phones.

The SmartTag is small enough it won't get in the way. .

Samsung on Thursday held its first Unpacked event of the year, where in addition to a trio of new Galaxy S21 phones, the company also introduced the SmartTag and SmartTag Plus.

Samsung is bundling a free SmartTag with Galaxy S21 preorders. .

For a start, SmartTags connect to SmartThings Find, a service that's already built directly into Samsung Galaxy phones -- SmartThings is Samsung's hub for smart home devices.

There are two versions of the SmartTags, because not all Samsung Galaxy phones support UWB, but they do all support BLE.

Only the Galaxy Note 20 Ultra, the Galaxy S21 Plus and S21 Ultra support UWB. .

Samsung is launching the standard SmartTag first, with the UWB version SmartTag Plus launching later.

The SmartTag that's available for the Galaxy S21 launch is $30 for one, $50 for two and $85 for a four-pack

If you preorder a Galaxy S21, you'll get one SmartTag for free, along with a credit that ranges from $100 to $200, depending on which S21 model you order. 

Currently, the Galaxy S21 Plus, S21 Ultra and last year's Note 20 Ultra support the UWB SmartTag technology

All other Galaxy phones only support the BLE version of the SmartTag.