Human beings were made to move. From the time we roll out of bed in the morning to the moment we crawl back in at night, we are constantly on the go. It's time to get credit for all that activity. Working seamlessly with your iOS or Android smartphone, the Timex® IRONMAN® Move x20 activity tracker measures your movement all day, tracks your workouts and even helps you stay on top of texts and calls. It gives you the tools you need to turn your actions into insights, and helps pace you perfectly in that little race called life.Tracks and displays: steps, distance, calories, time of day and dateDisplay caller ID + texts with Timex connected phone appAll day activity monitor featuring 3D accelerometer technologyFind Phone featureRecords total sleep time and the hours/minutes of light sleep, deep sleep and awake timeWorkout mode features tracking of: elapsed time, distance, pace,calorie expenditure and steps (speed available on app)Vibration alertGoal completion alerts (requires goal setup in Smartphone app)Holds 30 days of daily data, 30 workout files, and 10 days of sleep dataLow battery alert at 10% batteryRechargeable Li-ion battery, 7 days typical battery lifeIPX7 waterproof rating (protected against splashing water)Easy to read, illuminated charactersCOMPATIBILITYMove X20 is compatible with phone apps on iOS® and Android® Smart phones. Phone and text notifications available only with iOS® 7 or later (compatible with ANCS), and Android® 4.3 or later. Communicates with the following devices:Samsung Galaxy SIII, S4, Note II, Note IIIApple iPhone 4S, 5, 5S, 5CApple iPhone 6 & 6 PlusLG Nexus 4, Optimus GMotorola Moto XHTC One X