The Flex 2 from Fitbit is a slim, stylish device that stays with you all the time and can be hidden in wristbands, bangles and pendants (bangles & pendants sold separately). By day it tracks your activity, recording steps, distance and calories burned, during the night studies your sleep quality and wakes you silently in the morning. Measuring these stats against your personal goals, the Flex 2 gives you the motivation you need to get out, be more active and make the most of your health and your life.SmartTrack technology will automatically recognise selected workouts and record them for you in the Fitbit app making sure you can reap the benefits of your exercise even if you forget to track it. As well as the active part of the day it will also monitor your sleep with regards to quality, hours slept and the number of times you wake up, with the aim that you can learn what helps you sleep and what makes you irritable during sleep so that restless nights can become a thing of the past. It also boasts a silent vibrating alarm to enable a more peaceful awakening at just the right time without waking anybody else up.It is swim-proof and able to sync wirelessly with your smartphone and other devices for excellent convenience.Compatible with PC’s, Macs and many iOS devices and android phones, the Flex 2 automatically syncs your data without any hassle. This gives you access to your personal progress and allows you to see trends in the data and make the most out of what works best for you.