Aize Tw64 Bluetooth Smartband Smart Watch Wrist Band Smartwatch Pedometer Fitness Activity Tracker Anti-lost for Android IOS Smartphones (Black) 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 Synchs via wireless bluetooth, also PC via USB. Designed with IP67 for good waterproof performance. Using led lights and vibration motor to remind twice Included: Host Wristband, Snaps, Manual