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Along with the new Xiaomi Mi-4 smartphone , Xiaomi has launched their first wearable device - Xiaomi Mi Band . It is a fitness monitor and sleep tracker wrist band which is launched at a very affordable price of US $13 ! It is water proof , so you can wear it while bathing and check your activity while swimming ! With its sleep tracker you can now actually know did you get enough sleep last week or you were more lazy . The fitness tracker counts all you activity as in total distance walked , running distance , calories burnt , etc. .
