2 to 5 business days
Heart Rate Monitoring:According to your heart beat frequency, Help you to Better Understand the amount of Exercise you can Afford A variety of Exercise Modes: Track your daily record of calories burned while you are running. Helping you better achieve your sport goals OLED 0.96 Inch Screen: View your health data on a Color OLED 0.96 inch screen and customize your clock face that suits your taste.