15 minutes of time: The product has 15 minutes, common time to enjoy a sauna session. Also includes approximate markers of 5 and 10 minutes for your shorter needs. Clock rotatable: this wooden hourglass is very easy to mount on the wall with 2 screws (not included), align the wooden mounting strip fixed vertically, screwed into pre-drilled holes, so that the mounting strip is perfectly hidden behind the hourglass. Widely used: This hourglass is designed to withstand the heat and steam of a sauna.it can also be used for other purposes, in classrooms, yoga or exercise rooms, or any other timed use . Specifications: Condition: 100% brand new Material: wood, glass Time: 15 minutes Application: Sauna Room Size: As Picture Shown Package Included: 1 * Sauna Room Sand Timer Note: 1. Please allow 0~1 error error due to manual measurement. Thanks for your understanding. 2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard.