Veridian Healthcare iHealth Wireless Activity and Sleep Tracker measures steps taken, distance traveled, and calories burned and tracks sleep hours and sleep efficiency; emails your results directly from the App. Comes with interchangeable wristbands & clips (Blue & Black); Sweat, rain and splash resistant; Connects wirelessly via Bluetooth 4.0 with low energy technology; Vibrating silent alarms for sleep. Free iHealth MyVitals app and cloud service includes personalized health tools, available through the App Store; battery included: 3.7v Li-ion.