The Timex IRONMAN Run x50+ is a fitness watch that delivers access to all of your fitness data, even when your smartphone isnt readily available. During a run or workout, instead of reaching for your phone to assess your progress through an app, you can now simply look at your wrist. The Run x50+ streams data directly to your wrist, including your elapsed time, pace, distance and heart rate. A lightweight and comfortable design make it easy to wear all day. Compatibility: Compatible with select iOS® and Android® smartphones. Communicates with iOS 8.0.2 or higher and Android 4.4.2 KitKat or higher. Bluetooth Smart compatible. Currently compatible with Wahoo Fitness, Runkeeper and Strava. Connects with free Timex phone app to display caller ID, texts and push notifications. Features: Phone-finder and watch-finder activates audible alerts. Allows control of music in the fitness app or on phone (stored music or live streaming). Notifies of upcoming appointments from smartphone calendar. Built with two programmable interval timers with selectable labels. Features a 3-workout memory with dated summary. 50-Lap stopwatch with 2-line display. Built with 3 programmable alarms with backup. High resolution, reversible display with multiple options for Time-of-Day screen.