The first Fitbit from Google, the Fitbit Sense 2 features all the great features you know and love from Fitbit with the promise of many of the Google features we use every day. The Fitbit Sense 2 offers robust fitness tracking, ECG, SpO2 sensor, sleep tracking, and much, much more. Waterproof and lightweight, the Fitbit Sense 2 is the all-in-one fitness wearable for any lifestyle.