💪 Fitbit Charge 2 Heart Rate + Fitness Wristband, Special Edition Gunmetal, Large (US Version) - Enhanced for SEO Review

Pure Pulse continuous, automatic wrist based heart rate tracking to better measure calorie burn all day; Operating temperature: 14 degree to 113 degree Fahrenheit, Maximum operating altitude: 30,000 feet. Maximize your workouts using simplified heart rate zones (Fat Burn, Cardio and Peak); Charge 2 syncs wirelessly & automatically to 200+ iPhone, Android and Windows devices; Water Resistance : Fitbit Charge 2 is sweat, rain and splash proof; However, the device is not swim proof or shower proof. See call, text & calendar notifications on the OLED display; Automatically track how long and how well you sleep and wake with a silent vibrating alarm; Troubleshoot If not getting a heart rate signal, wear your tracker correctly, either moving it higher or lower on your wrist or tightening or loosening the band; If the heart rate signal is still missing, check your heart rate setting on your Fitbit dashboard and make sure its set to on or auto. Get a better understanding of your fitness level and see how you can improve over time with a personalized Cardio Fitness Score; Use Connected GPS during run mode to see real time stats like pace and distance on your wrist. Track all day activity like steps, distance, calories burned, floors climbed and active minutes; Find moments of calm throughout your day with personalized guided breathing sessions based on your heart rate, Like all heart rate tracking technologies, accuracy is affected by physiology, location of device, and different movements. Sync stats wireless & automatically to computers and 200+ leading iOS, Android and Windows devices; The minimum and maximum circumference range between 170 to 206 millimeters.