Comfortable to wear: Made of thermoplastic elastomer it is more comfortable to wear double-breasted design allowing you to move without falling off. Motion monitoring: automatically record the number of steps and burn calories. Sleep Monitoring: The bracelet automatically detects your sleep and generates a sleep report. Waterproof design: IP67 waterproof performance swimming rain water environment is completely fearless let you enjoy the fun of life. Additional functions: High-sensitivity touch screen which can realize various operations information content steps calories distance weather and other functions quickly view and thus open smart life.