Lefun(TM) Air Bluetooth 4.0 Sport Smart Watch Fitness Tracker Bracelet Touch Screen IPX7 Water Resistant Wristband with Pedometer Sleep Monitor Calorie Count and Anti-lost for Android cell phones and IOS iPhone 6/6 Plus/5S/5/4S (Black) The Lefun Air Bluetooth 4.0 Sport Smartwatch is the world's first most innovative smartwatch with extremely compact design. High Performance functionality combines with advanced smart features makes it as your indispensable everyday personal fitness companion. As the up-to-date sports smartwatch that accurately records and tracks health and fitness activities such as walking, running, sleeping, cycling and more, the Air synchronize activity data via Bluetooth with the powerful app on your cell phone to count and display your steps along with showing calorie burnt and distance traveled during your sports activities. The seamlessly sealed structure makes the Air IPX7 water resistance level. No worries to sweat, water or even swimming. Packed with powerful features, this cutting edge smartwatch takes personalized health care to the next level by analyzing your sleeping quality, providing round the clock health monitoring for the most complete picture of your fitness. Enjoy the convenient call reminder (including caller ID) and message functions either by vibration or display to keep you stay connected. The SES low power consumption and the latest Bluetooth 4.0 technology makes the Air last a lot longer than ordinary smartwatch, up to 15 days for one single charge. No need to worry about charging it every other day so that it accurately keeps your activity records. Magnetic charging dock just makes charging much more handy. It greatly keeps your Air integrated.