The PolarM400 GPS Watch with HRM combines popular fitness band features with advanced GPS and training plans to create a sporty and functional training partner. Helping you make adjustments to both lifestyle and training to reach peak performance, it will sync with your mobile device and computer. . Built in GPS allows you to track speed, distance, pace, and altitude. Provides basic watch functions, such as time and date. Back to Home feature directs you to your starting point in the shortest distance possible. 247 activity tracker records steps, calories, active time, and sleep duration and quality. Train at the right intensity with sophisticated and personal heart rate training. Connect to Polar Flow mobile app via Bluetooth for instant analysis. Use Polar Flow web service to create detailed training targets and interval workouts, and sync them with your device. Use Polar Flow web service to analyze past workouts. Mobile app works with iPad 3rd and4th generation, iPad mini, iPhone 4s, iPhone 5, iPhone 5c, iPhone 5s, iPod touch 5th generation an Android version will be available in December 2014. Data export via standard micro USB cable. Polar Flow web service compatible with PC Windows XP, Windows 7, Windows 8, and later also compatible with Mac OS X 10.6, 10.7, 10.8, and later. Battery life: up to 8 hr. training time when both GPS and HR are in use, 24 days in time mode with daily activity monitoring. Water resistant to 30 m.