The Mio Link is a clean, comfortable heart rate wristband that can show you 5 different heart rate zones that are easy to read and understand. The Mio Link is waterproof up to 30 meters so you can train in any conditions, and the heart rate technology will make sure you get as accurate of a reading as possible. The built-in Bluetooth connectivity allows you to view your heart rate on your smartphone and link up your Mio data to third party apps. The battery life can last up to 8 hours when in workout mode, but if the heart rate monitoring isn’t on all the time, it can last up to a month.