Main Features: 
-    Heart Rate Monitor 
All-weather record your heart rate so that you can set a more suitable exercise plan    
-    Bidirectional Anti-lost 
Convenient to find the wristband or the phone by connecting the Bluetooth    
-    Calls Alert 
Remind you calls or SMS in order to not miss any important information    
-    Sleep Monitor 
Record your deep sleep and light sleep time, about daily, weekly and monthly data, convenient to improve your sleep quality better    
-    APP Download 
Search    FitCloud in the Google Play or App Store to download it, combine with the phone, enjoy sports life better   
 

Specifications:
Bluetooth version: Bluetooth 4.0    
Waterproof rating: Life water resistance  ( Can not be used in swimming,showering )
Bluetooth calling: Phone call reminder    
Messaging: Message reminder    
Health tracker: Drinking reminder,Heart rate monitor,Pedometer,Sedentary reminder,Sleep monitor    
Notification: Yes    
Notification type: Facebook,Wechat    
Anti-lost: Yes    
Find phone: Yes    
Alert type: Vibration    
Other Function: Alarm,Weather forecast
Screen: LED    
Screen size: 0.66 inch    
Operating mode: Touch Screen
Type of battery: Li-polymer Battery    
Battery Capacty: 65mAh    
Charging time: About 2-3 hours    
Standby time: up to 15 Days
Shape of the dial: Rectangle    
Case material: ABS    
Band material: TPU
Compatible OS: Android,IOS    
Compatability: Android 4.4 / iOS 8.0 and above systems    
Language: English,Simplified Chinese    
Available color: Black,Blue,Purple,White
Dial size: 5 x 2.3 x 1.1 cm / 1.97 x 0.91 x 0.43 inches    
Band size: 25.5 x 2 cm / 10.04 x 0.79 inches    
Product size (L x W x H): 25.50 x 2.30 x 1.10 cm / 10.04 x 0.91 x 0.43 inches    
Package size (L x W x H): 15.40 x 8.90 x 3.60 cm / 6.06 x 3.5 x 1.42 inches    
Package weight: 0.139 kg
Package Contents: 1 x V66 Smart Wristband, 1 x User Manual, 1 x Charging Cable

Warranty : 1 Month (Manufacture defect only)