Make fitness fun with Naxa's LifeForce+ Fitness Watch for iPhone and Android (NSW-14). This fitness watch comes with a step counter and calorie tracker, which helps you improve your health by breaking it down into an easy-to-understand science and drives your motivation. Build a regimen thanks to the fitness coach with companion app, downloadable for your smartphone. The NSW-14 also features sleep monitoring to track your sleeping patterns related your health and fitness. Make and take calls hands-free and get app notifications when connected to your smartphone. The durable and adjustable fitness band allows for a comfortable fit throughout the day. The watch face is customizable to fit your own personal style. Powered by a built-in rechargeable battery or a USB charge cable.