Key Features . Aluminium CaseTrack your steps monitor your heart rate and more!Built-in GPSOxygen Saturation Monitoring6 Day Battery LifeWater resistant to 50 metres . Fast ChargingSpend less time charging more time moving when you get a full day’s worth of battery in just 12 minutes. 6+ Day Battery LifeGet a week of battery life without stopping to charge along with fast charging—fuel for a full day in just 12 minutes. Voice AssistantUse Google Assistant or Amazon Alexa Built-in to ask your Fitbit smartwatch questions set alarms check the weather and more. 20+ Goal-Based ExercisesChoose from 20+ activity modes to get real-time stats during workouts or let SmartTrack automatically recognise and record them for you. Fitbit AppSee all your stats track progress enter challenges and interact with a global fitness community. Built-in GPSDuring outdoor runs rides hikes and more use built-in GPS to see your pace and; distance without your phone then see a map of your workout route in the Fitbit app..