Features:

Functions: Heart rate monitor, Step pedometer, Calorie burnt, Distance track, Sleep monitor, Call remind, Message Remind,Alarm remind, Anti-lost, Waterproof, etc.
Vibration: Yes
Waterproof : IP69
Size & Type: 0.66''; 64*48, OLED
Bluetooth: BLE Bluetooth 4.0 Sync
Outlook & Material: Host: Plastic; Strap: High quality Sillicone"
Size: 220x23x11mm
Weight: 30g
Battery: Li Battery
Capacity: 100 mAh
Standby Time: 5-7days
Charge Time: 60 minutes
App OS: IOS 7.1 & above / Android 4.3 & above

Note:IOS doesn’t support calls remind and message remind
About waterproof:Normal life waterproof,We recommend remove the band when you have a  shower or swimming