Fitbit Charge 2 Heart Rate and Fitness Wristband. Make every beat count. Get PurePulse continuous, automatic wrist-based heart rate tracking--all-day, during workouts and beyond--all without an uncomfortable chest strap Use continuous heart rate to better measure calorie burn all day and help you stay on track toward weight goals Maximize your workouts using simplified heart rate zones (Fat Burn, Cardio, and Peak) to gauge exercise intensity and ensure you're optimizing your effort for your goals Track resting heart rate to gauge how your cardiovascular health and fitness levels change over time Track all-day activity like steps, distance, calories burned, floors climbed, and active minutes Use Connected GPS during run mode to see real-time stats like pace and distance on your wrist (when your phone is nearby) and see a map of your route post-workout in the Fitbit app Effortlessly and automatically record select activities like walks, runs, rides, treadmill, sports, and aerobic workouts with SmartTrackTM automatic exercise recognition Automatically track how long and how well you sleep and wake with a silent vibrating alarm Use multi-sport modes to track specific workouts (Run, Bike, Weights, andmore), see real-time exercise stats like heart rate and calories burned on display, and get post-workout summaries on display Get a snapshot of your cardio fitness in the Fitbit app and follow your improvements over time Find moments of calm throughout your day with guided breathing sessions that are personalized based on your heart rate Stay connected with call, text, and calendar notifications on display (when phone is nearby) Get friendly Reminders to Move that encourage you to stay active throughout the day Make every beat count with Fitbit Charge 2! Fitbit Charge 2TM is the all-new heart rate and fitness wristband built for all-day, workouts and beyond. PurePulse continuous heart rate makes it easy to maximize workouts, better track calorie burn, and get a sn

The minimum and maximum circumference range between 140-170 mm. This Certified Refurbished product is tested and certified to look and work like new. The refurbishing process includes functionality testing, basic cleaning, inspection, and repackaging. The product ships with all relevant accessories, a minimum 90-day warranty, and may arrive in a generic box. Only select sellers who maintain a high performance bar may offer Certified Refurbished products on .

Battery Description: Lithium-Ion. Sensor Type: Wearable. Battery Life: 5 days. Item Dimensions LxWxH: 8.62 x 0.89 x 0.51 inches. Color: Teal. Brand: Fitbit. Date First Available: July 5, 2018. Best Sellers Rank: #98,202 in Sports & Outdoors. Customer Reviews: 4.3 out of 5 stars 619 ratings 4.3 out of 5 stars. : B07F91KM14. Size: ?Small. Part Number: ?FB407STES-cr. Manufacturer: ?Fitbit. Number of Items: ?1. Color: ?Teal. Warranty Description: ?90 days limited warranty. Brand Name: ?Fitbit. Item Dimensions LxWxH: ?8.62 x 0.89 x 0.51 inches. Package Weight: ?0.3 Kilograms. Item Package Dimensions L x W x H: ?7.9 x 5.5 x 2.3 inches.