Mini Kitty Fitness Tracker with Heart Rate Monitor Smart Wristbands with Activity Tracker for iPhone Android Smartphone (Black) Powerful Function-Equipped with new Heart Rate Monitor Function, plus Pedometer, Distance, Calories Burned Measuring, Sleep Monitor, SMS Reminding, Call Reminder, SMS Content Shows, Incoming Call ID Show, APP Message Reminder (Like Facebook, Twitter, etc), Camera Remote Control, Sedentary Reminder, Find Your Phone, Anti-lost, Sports target remind. Convenient USB Charging- Adopts the USB charge port, even without the charge cable. It can remove from the bandonly, only there are some USB port device, you can plug inot the bracelet to charge well anytime and anywhere. Activity Tracking for Workouts- It tracks all-day activity like steps, distance, calories burned, floors climbed and active minutes, and these data can sync to the app. Built-in high perfermance G-sensor, you can get more accurate data to maximize the workouts in a whole day. Great Craftmanship- This upgraded wristband with built-in 0.86 inch OLED display screen, clearly showing the date, clock and battey power. Just 18g, it looks fashion and sleek. Silicone watchband with adjustment holes, for men, women, children, wear it comfortable and valuable. Qualified Customer Service-We want to bring you not just the best product we have but also service, thus we are providing 1 year warranty for all the products you bought for us.