PLAY X STORE Sports Bracelet Bluetooth Smart Watch Activity Tracker WristWatch Intelligent Notification: The best fitness tracker let you know when you have calls, texts and Anti-lost Activity Monitors: The exercise tracker supports sleep monitor, steps pedometer, fitness trackers calories tracker, health tracker, walking distance recording, alarm alert for getting up, drinking, sedentary remind. Minimalistic Design: lightweight and flexible waterproof band that is easy and comfortable to wear. Remote taking photo function: You can control your cellphone to take photo from your wrist. USB Connect: Host with USB port, easy to get charged in PC or any USB charger. This fitness tracker need its corresponding software to work out the daily data, which need download from the Apple Store or Goolge Play. If the APP do not work, please check the bluetooth connect or wipe cache. The operating rang for this fitness band is 10m, please do not beyond this distance. Or will disconnect. And If it still do not sync the data, please reset the bluetooth. Please keep the fitness tracker near enough to your wrist in order to collect the data of your sleeping, your daily steps info, and your calories burned. And please wipe cache on the APP regularly, so that could confirm the enough room to its data calculate.