PRODUCT GRADING Excellent (Grade B) - Will have very light scratches and light signs of use > Refurbished to the highest standards. Brown Box   WHAT IS IN THE BOX Fitbit Blaze Fitness Activity Tracker (FB502) PRODUCT DESCRIPTION Get continuous, automatic, wrist-based heart rate & simplified heart rate zones. Reminders to Move, get friendly reminders to move that encourage you to reach an hourly goal of 250 steps. Automatically track your sleep quality & wake up peacefully with a silent alarm. You can get a better understanding of your fitness level and see how you can improve over time with a personalized Cardio Fitness Score. Find moments of calm throughout your day with personalized breathing sessions based on your heart rate. PRODUCT INFORMATION  Battery type - Lithium-polymer Charge time - One to two hours Radio transceiver - Bluetooth 4.0 Display - Touch screen Syncing range - Up to 6.1 m Syncs with Mac OS X 10.6 and up, iPhone 4S and later, iPad 3 gen. and later, Android 4.3 and later, and Windows 10 devices. Saves 7 days of detailed motion data – minute by minute. Sensors & Components - 3-axis accelerometer