Decorative hourglass, also known as a sand timer or sand clock. It features a brass-tone metal frame and a rotating design that allows the user to turn it over to start the sand flow.
It is a decorative item for home or office use, and may not be intended as a precise time-measuring instrument.
The device is designed to measure the passage of time using the flow of sand from an upper glass bulb to a lower one.
Some models are designed to measure specific durations, such as 60 minutes, and can be used for time management.