The features of the gadget are currently unknown. It is highly probable that the device will come with functionalities, similar to the S Band wearable. The S Band, released along with the Samsung Galaxy S4, is a healthcare monitor. In this line of thought, could this Samsung S Circle wearable turn out to be a fitness accessory compatible with the Samsung Galaxy S5?
Only time will show.
Samsung S Circle - an upcoming activity tracker?
source: FCC, Bluetooth SIG via Engadget