W7 Silicone Fitness Motion Activity Sleep Tracker Sport Smart Wrist Bracelet

dark grey
Blue and white
Color: black+gray, black+red, blue+white (optional)
Material: silicone
Display size: 1.25 inches
Battery capacity: built in 50mAh lithium battery (included)
Charging method: USB charging
Charging voltage: DC 5V
Charging time: 2 hours
Standby time: 30 days
Operating temperature: -5--45℃
Waterproof grade: Life waterproof
Data transfer: mobile audio port connection
Function: time display, alarm clock, smart reminder, pedometer, calorie.
Compatibility: android4.0, IOS7.0 and above
Strap length: 25cm (including host)
Strap width: 17mm