Smart bracelet black adjustable Health Sports bracelet, NWT

Smart bracelet black adjustable Health Sports bracelet, NWT -with call reminder, sleep monitoring, calorie consumption and movement distance -comes with charger, manual, adjustable wristband and tracking device - the first smart bracelet with OLED, recording Sports data in daytime and sleeping data at night to guide Healthy Living lifestyle - host comes with standard USB port, special design to charge through connecting PC and mobile driver - computers and Android dual mode synchronous data host sinks via wireless Bluetooth also PC via USB - designed with IP67 for good waterproof performance - using LED lights and vibration motor to remind twice