Xiaomi Mi Band 3 Smart Sports Bracelet

Features:
* Large OLED Display:
That screen is a 0.78-inch OLED panel with a resolution of 128*80P, which considering the size of this display and what you'll need from a fitness tracker should look great on your wrist.
* 5ATM Waterproof Level:
The whole fitness tracker is waterproof up to 50 meters, which is some of the best waterproofing we've seen on a wearable and will mean you're able to take it swimming and in the shower too.
* Compatibility:
It has BT 4.2 technology inside and it'll be able to work with both Android 4.4 and above phones as well as iOS 9.0 and above.
* 20-day Battery Life:
The battery inside the Xiaomi Mi Band 3 is a 110mAh cell, which the company claims will last around 20 days from a single charge.
* Intelligent Tracker:
There's also a sleep tracking feature onboard that should be able to give you basic stats on your sleep quality.
* Messages Notifications:
You'll get limited notifications such as your incoming calls, text messages and certain messaging apps. And you'll be greeted with your WeChat or QQ messages in China.
* Smart Reminder:
The band sets up event reminders, alarms and weather forecasts to make them easy to view on your wrist.