The unrestricted shower head can use 15l of water per minute, so a 20-minute relaxing shower takes 300l of water (9000l per month).A challenge to shorten this by only 5 minutes saves 70 liters of water per shower (2100l per month ).This Shower Clock will help you save water, energy (gas/electricity), and time waiting for your turn to take a shower.It has a clear time when not in use, that changes to a timer which can be set in 10 and 1-minute increments and can be easily reset when required.Can be installed using a suction pad or a slotted hole to be hand on the wall.It's water-resistant which is great in a moist environment. LCD screen widens visual angle, has better visual effect than the old version, easier read the time reading clearly The shower clock can display Room Temperature, Indoor Humidity (Range is 15%-95%) 3 Mounting Methods: PVC Suction Cup, Hole for Wall Mount; Stand for Sink, Table The time format setting, temperature setting, and adjust button on the back of the clock Powered by 2 x AAA Batteries (Not Included)