Features:
Automatically tracks heart rate, steps, distance, calories, and sleep quality
20 days of battery life on a single charge
Easy access to time, date, battery life and all stats via touch screen display
Boasts a water and dust resistance rating of IP67
Features silent vibrating alerts for incoming calls and alarms
 
Specification:
Brand: XIAOMI Amazfit
Item Weight: 4 ounces
Product Dimensions: 9.9 x 0.8 x 0.2 inches
Item model number: A1603
UPC: 851572007108
Batteries: 1 Lithium Polymer batteries required. (included)
Color: Black/silver
Battery Cell Type: Lithium Ion
Average Battery Life: 480 hours
 
Package Contents: 
1 x Smartband 
1 x USB Charger
1 x English User Manual