Simple-operate: Easy to read the LCD display. Change the mode with a single button. Mutil-Function:Not only a fitness wristband for Calorie Counter ,but a Accurate Step Counter and a watch. Special-design: Lightweight , without the load sense, ,very fits for outdoor activities. Easy to use: No need pair with mobile phone , no Bluetooth,no APP, easy to work . Warranty: If there is any problem with our product, we'll refund you money.