A stylish ornament to place on your desk to improve your work efficiency. The blue sand flows slowly and can last for 30 minutes. The black glass frame can serve as a and home decoration. Can you use it as a timer when doing a mask or yoga, enjoy the ? ?Good time and wonderful memories with it. They can act as children playing in leisure time or study time, as well as exercise their patience and perseverance. GUARANTEE: Customer is our top priority. , please feel to us.