Enhanced optical heart rate¹ technology gauges the intensity of your fitness activities as well as heart rate variability to calculate your stress level score. It also tracks under water without a heart rate strap.
Pulse Ox Sensor
For altitude acclimation or sleep monitoring, a Pulse Ox² sensor uses light beams at your wrist to gauge how well your body is absorbing oxygen.
Body Battery™ Energy Monitor
Optimize your body’s energy reserves, using heart rate variability, stress, sleep and other data to gauge when you’re ready to be active or when you may need to rest.
Internal, rechargeable lithium battery provides up to 9 days of battery life in smartwatch mode, 6 hours in GPS mode with music and up to 34 days in battery saver mode.