Optical heart rate monitor – continuous, accurate heart rate without a chest strap via a 6 LED optical sensorIntegrated GPS – running watch tracks speed, distance, pace and routes. Display resolution: 128 x 12824/7 activity tracking – Track your daily activity, including steps, calories and sleep with the guidance to help you reach your activity goalVibration alerts – be alerted with vibrating notifications of incoming calls, messages or during training and periods of inactivityRechargeable Battery – three different GPS watch recording options to choose from allow for 8 hours to nearly 30 hours of training time. Rechargeable 240 mAh lithium polymer battery
