While living a hectic lifestyle, you might forget to take care of your health. If this is the case and you want to remain fit and fine, then it is vital to purchase Fitbit Flex Wireless Activity Tracker and Sleep Wristband that ensures that you remain active through out the day and also get a good sleep. The band can record steps taken, distance travelled and calories burned. Do not worry about charging it every now and then, as it is equipped with a good quality battery- Lithium-polymer that has a life of up to 5 days. So, stay fit!