15 Minute Time: The product has 15 minutes common time to enjoy a sauna session. Also includes approximate 5 and 10 minute markers for your shorter needs. Rotating Clock: This wooden hourglass is very easy to mount on the wall with 2 screws (not included), align the wooden mounting strip attached vertically, screwed into pre-drilled holes, so as to perfectly conceal the mounting strip 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 the picture shown Package included: 1 * Sand timer for sauna room Note: 1. Please allow 0 ~ 1 error due to manual measurement.Thanks for your understanding.