Get better results from your workout routine with the Versa 4. Know when you're up for a challenge or need a recovery day with your personalized Daily Readiness Score. Track more exercises than ever right from your wrist with 40+ exercise modes. Choose from modes like strength training, HIIT, running, kayaking and more to see key results in real time--including Active Zone Minutes which shows your target intensity levels. Do it all with a thin, lightweight fitness smartwatch designed for comfort during workouts, sleep and more. Plus, never miss a beat with calls, texts and notifications right on your wrist and a battery life of 6+ days. Fitbit is a part of the Google family. Charge time: 120 minutes.