Natural Timer- The hourglass handcrafted with wood, compacted glass and natural white sand. It has high heat resistance. Therefore, you not only ensure the safety of the sauna, but also use it for a long time. It is also an ideal gift for lovers of garden saunas or infrared cabins.Smart Design- The sauna clock ensures a healthier sauna. With contrasting colors, you can still see a clear image from a few feet away. With a sauna of a reasonable duration, you can effectively strengthen the immune system and the cardiovascular system.Deviation 10%- Our sauna hourglass has greatly reduced the error limit below 10%.Product Uses- Can be used as children’s toys, family decoration, board game card synchronization, sauna synchronization.Note- It can be installed by tapping it on the back and rotating it 360 degrees. You can also add glue if needed; the hourglass time is a bit inaccurate, the error value is in a minute or two.Number of pieces delivered: 1Size: 29*5cm